If she does not hurry, she’ll be late.

Should ....................................................................................................................

1.      As the professor was speaking too fast, I couldn’t understand everything.  

If the professor..............................................................................................................

2.      Our crops couldn’t grow if we didn’t have more rain.                                          

Unless ........................................................................................................................

3.      He doesn’t practise speaking French, so he doesn’t speak it fluently.     

Were ..........................................................................................................

4.      The meeting can be cancelled because it snows heavily.

Were .....................................................................................................

5.       My brother didn't leave the car keys, so I couldn't pick him up at the station.

Had  ................................................................................................

1.      You shouldn’t drink that wine.                                                                             

If I were …..................................................................................................................

2.      You didn’t have breakfast this morning, that’s why you are hungry now.          

If you . ....................................................................................................................

3.      We have no money left because we spent too much last month.                         

If we.. .....................................................................................................................

4.      They missed the turn as they were talking.                                                

Unless they …................................................................................................................

5.      He was sleeping, that ‘s the reason why  he couldn’t hear the knock at the front doo   

If he …................................................................................................................

1.      We missed the bus because we got up late.                                               

Had we..........................................................................................................................

2.      I didn’t have enough money, so I couldn’t buy the novel.                        

Had I .........................................................................................................................

3.      My father isn’t here, therefore he can’t give us some advice.                              

Were my father …............................................................................................

4.       If you don’t work harder, you will be sacked                                                       

Should.. .................................................................................................................

5.      He was driving very fast because he didn’t know the road was bad.                   

If he …..................................................................................................................

1.      I couldn’t get a higher mark because I didn’t have enough time.                       

If I.......................................................................................................................

2.      Stop talking or you won’t understand the lesson.                                                  

If you....................................................................................................................

3.      John caught the rain yesterday, the ‘s the reason why  he is ill today.                             

Unless he .......................................................................................................................

4.      Work harder if you don’t want to lose your job.                                                   

Unless..........................................................................................................................

5.      I couldn’t help you because you didn’t tell me about your problem.                   

I could .........................................................................................................................

6.      If you don’t go away, I will phone the police.                                                       

Unless............................................................................................

1.      Be careful, or you make a wrong decision.                                               

If you ……...................................................................................................................

2.      He decided to leave because you didn’t believe in his talent.                               

You  ......................................................................................................................

3.      Today is very cold, so we couldn’t go swimming.                                    

If today ....................................................................................................................

4.      Don’t make noise or you’ll wake up the baby.                                                      

If you .........................................................................................................................

5.      If you don’t invite her, she won’t come.                                        

Unless you ...................................................................................................................

1.      I’ll go out with you this evening if I (finish) ………………my work early.

2.      If Martin had set his alarm clock, he ................................ (not oversleep).

3.      If you (speak)......................more slowly, he might have understood you.

4.      I (buy)…………………..shares in that company if I had some money.

5.      If you drove more carefully, you  (not have)………….. so many accidents.

6.      We’ll have to go without John if he ( not arrive)…………….soon.

7.      Please don’t disturb him if he ...................................... (be) busy.

8.      If she ........... (accept) your card and roses, things will be very much hopeful.

9.      If he (wash)…………………………..my car, I’ll give him $20.

1.      He would have died if the doctors (not operate) …………………on him.

2.      If I had a car, I (give) ………………………you a ride.

3.      If I meet Paul tomorrow, I (give) ………………………him your letter

4.      If the weather (be)………..…nice next weekend, they will go to the country.

5.      Unless people (eat) ……………so many sweets, their teeth wouldn’t fall out.

6.      If a holiday .................................... (fall) on a weekend, go to the beach

7.      If we (take) ……………………your advice, we’d have saved a lot of time.

8.      Unless you hurry, we (be) ………………………late for the match.

9.      If you didn’t smoke so many cigarettes, you (feel) ………………better.

10.  If she (come)…………………………. late again, she’ll lose her job.

11. She would be better-looking if she (not have) ………………such a big nose

‘I find it hard to build a toy car.’ ‘But ................’

A. my pleasure

B. it’s my fault.

C. it sounds great!

D. it’s right up your street!

Giải thích giúp mình với ạ

Dẫn khí Cl2 dư vào 400ml dung dịch SO2 thu được dung dịch X. Cho BaCl2 dư vào dung dịch X thấy tạo thành 46,6 gam kết tủa. Nồng độ mol của dung dịch SO2 là 

A. 0,4 M

B. 0,3M

C 0,1M

D.0,5M