1 were - would know

2 had studied - would have passed

3 throw

4 were - would tell

5 had had - would have taken

6 have - will give

7 wouldn't have got - had remembered 

8 would change - were

9 is

10 had - wouldn't have to

\(19.\\ a)n_{Mg}=\dfrac{2,4}{24}=0,1mol\\ Mg+H_2SO_4\rightarrow MgSO_4+H_2\\ n_{H_2}=n_{H_2SO_4}=n_{Mg}=0,1mol\\ V_{H_2}=0,1.22,4=2,24l\\ b)m_{ddH_2SO_4}=\dfrac{0,1.98}{10}\cdot100=98g\)

\(20.\\ a)n_{NaOH}=0,2.1=0,2mol\\ 2NaOH+H_2SO_4\rightarrow NaSO_4+2H_2O\)

0,2                0,1                0,1            

\(m_{Na_2SO_4}=0,1.142=14,2g\\ b)m_{ddH_2SO_4}=\dfrac{0,1.98}{5}\cdot100=196g\)

If I were lesbian, would you hate me?

Would  you visit me more often if I lived near you?

If she wore a red dress, would she look more beautiful?

Bài 1:

\(a=12+15+21+x=x+57\)

\(a⋮3\)

=>\(x+57⋮3\)

mà \(57⋮3\)

nên \(x⋮3\)

\(a⋮̸3\)

=>\(x+57⋮̸3\)

mà \(57⋮3\)

nên \(x⋮̸3\)

Bài 2:

\(A=75+1205+2008+x\)

=>\(A=x+3288\)

Để A chia hết cho 5 thì \(x+3288⋮5\)

mà \(3288\) chia 5 dư 3

nên x chia 3 dư 2

=>\(x=3k+2\left(k\in N\right)\)

1 study - will pass

2 shines - will walk

3 has - will see

4 come - will be

5 earns - will fly

6 travel - will visit

7 wear - will slip

8 forgets  - will give

9 go - will listen

10 wait - will ask

11 eat - will have

12 needs - will give

13 have - will meet

14 will talk - don't want

15 won't win - don't know

44 If I had known your name, I could have introduced you with my friends

45 If the driver in front hadn't stopped so quickly, the accident wouldn't have happened

46 If I had known Geogre wanted to get up early, I would have waken him 

47 If Jim hadn't lent me the money, I wouldn't have been able to buy the motorbike 

48 If she hadn't been wearing the seat belt, she wouldn't have injured (câu này sao ta)

49 If she had had enough money on her, she would have bought the coat

50 If....(tên ai đó) hadn't gone to the bus stop in time, she would have late for the interview

51 If.......hadn't recommened the hotel to us, we wouldn't have stayed at this hotel

52 If you had had breakfast, you wouldn't be hungry now

7 Tim told me if I didn't have a degree, I couldn't get a job easily

8 I told Martin he could sleep well at night, if he didn't drink too much coffee

9 Jim told Daise unless she chooses the words more carefully, she would be introuble

10 I said to Dick I would forget Ann's birthday if he didn't remind me

11 Jim told Jane he wouldn't have been late for his intervire if he hadn't missed the train

12 I told my friends if it didn't rain that morning, we could go for a picnic

13 I said if Linda had been at home the day before, I could have visited her

14 They said if the weather were nice that day, they would go to the zoo

a: Xét tứ giác ABHK có 

\(\widehat{AHB}=\widehat{AKB}=90^0\)

Do đó: ABHK là tứ giác nội tiếp