21/ ____ I talked to my boss, I decided to leave the company.

a In spite of

b Where

c As soon as

d Providing that

22/ ____ we called the museum, we found out that it doesn't have any space to display the items.

a When

b As long as

c Provided that

d Both a&c are correct.

23/ ____ you don't have any further questions, we will move on to the next item on the agenda.

a Provided that

b Providing that

c If

d All are correct.

24/ ____ Mr. Johnson left school, he started working as an accountant.

a After

b Before

c As

d When

25/ ____ I was walking down the street, I ran across my old friend from school.

a As b Since

c When

d Both a&c are correct.

26/ Our sales have dramatically increased ____ the new commercial was aired on TV.

a that

b for

c since

d when

27/ ____ we meet the deadline, we will be able to take paid vacation.

a When

b Providing that

c As soon as

d Both a&c are correct.

28/ ____ you have further questions, we will wrap up the session.

a Unless

b Since

c If

d When

29/ I knew nothing about the recent change in the hiring procedures ___ you told me.

a as long as

b when

c until

d provided that

30/ ____ nobody wanted to work overtime, we couldn't get it done before the deadline.

a Because

b As

c Since

d All are correct.

21/ He has his shoes ____ every day.

a made

b shined

c bought

d put on

22/ This noise is very ____.

a annoys

b annoying

c annoyed

d annoy

23/ It is not very easy to make her ____ once she gets upset.

a pleased

b pleasure

c please

d pleasing

24/ Two teenagers were among the fourteen people ____.

a arrests

b arresting

c arrest

d arrested

25/ Extremely ____ from the hard work, he couldn't walk an inch.

a happy

b excited

c exhausted

d busy

26/ Who is that man ____ the red jacket?

a wearing

b inside of

c having

d doing

27/ She said that the report was a bit ____.

a confuse

b confuses

c confused

d confusing

28/ ____ water is not safe for drinking.

a Polluting

b Pollutes

c Pollute

d Polluted

29/ He could easily make himself ____ if he tried.

a be understood

b understanding

c understood

d understand

30/ Don't leave your bags ____, as they may be removed without notice.

a attending

b unattending

c attended

d unattended

21/ Star Co. is ____ handling big orders.

a capable of

b a lots

c valuable

d Both a&b are correct.

22/ The reporter is busy ____ a video recording for the news program.

a prepare

b preparing

c to prepare

d has prepared

23/ Barun Technologies went bankrupt last month after ____ too much money from a bank.

a borrowing

b to lend

c lending

d to borrow

24/ The new union policy will prevent the staff from ____ fired easily.

a get

b being get

c got

d getting

25/ ____ a medium-sized heater is a better idea since bigger models consume more energy.

a Choosing

b Chosen

c To choice

d Chooses

26/ The factory supervisor suggested ___ the old cutting machines as soon as possible.

a upgrading

b to upgrade

c being upgraded

d upgraded

27/ Mr. Moore enjoyed ___ by the flight attendants in business class.

a be served

b being serving

c being served

d to serve

28/ City planners will start ____ the parks into shopping centers.

a converting

b conversion

c being converted

d to converting

29/ I forgot ____ the signed contract back to the real estate office.

a have sent

b send

c to send

d to sending

30/ The suspect tried to avoid ___ questions, which annoyed the investigator.

a for answering

b to answer

c answers

d answering

94) we can go out now_____anymore.

A. isn’t raining

B. Rains

C. has rained

D. has been raining

95) Look! That man over there_____the same as you .

A. has worn

B. is weaning

C. wears

D. has been weaning

96) I need a new job. I_______the same job jor a long time .

A. are doing

B. have done

C. have been being

D. do

97) I’m looking for Paul___you__him.

A. have-seen

B. did-see

C. do-you

D. is-seeing

98) Ann wants to see you. You___here jor ages.

A. have been

B. are

C. had been

D. are being

99) Look! The plane____toward the airport.

A. jlies

B. have jlown

C. is jlying

D. will jly

100) He works in a bank, but he___it very much.

A. doesn’t enjoy

B. haven’t enjoyed

C. didn’t enjoy

D. isn’t going to enjoy

21/ Have you ___ your homework yet?

a been finished

b finishing

c finished

d finish

22/ Father is ___ at the movie.

a laughs

b laughing

c been laughing

d laugh

23/ Our family ___ in this city for twenty years.

a is living

b has lived

c having live

d live

24/ The car ___ to my uncle.

a belonging

b belong

c are belonging

d belongs

25/ We ___ to London three times.

a have went

b have been

c went

d had gone

26/ The bus ___ every twenty minutes.

a are running

b runs

c running

d run

27/ I ___ to watch comedies on TV.

a liking

b am liking

c likes

d like

28/ She ___ on the phone when I came in.

a was talking

b had been talking

c has been talking

d Both a&b are correct.

29/ They ___ at two o’clock tomorrow.

a are arriving

b arrived

c have been arriving

d have arrived

30/ I’ve ___ the book already.

a will read

b read

c reading

d been read

21/ All employees have been working ____ for the last two months.

a later

b latterly

c late

d lately

22/ Hundreds of commuters were ____ to work because of the ____ of the train.

a late/ lateness

b lateness/ lately

c lateness/ late

d lately/ lateness

23/ We hope to settle the disagreement over the contract in a ____ manner.

a timely

b times

c time

d timing

24/ All the people were so shocked that they could ____ say anything.

a hardly

b hard

c to hardly

d hardness

25/ Sending the invoices by fax is ____ than delivering them by mail.

a more quickly

b quicker

c quicklier

d more quicklier

26/ You are advised to book your tickets two months in advance to get the ___ fares.

a cheapest

b most cheapest

c cheap

d cheaper

27/ The ballet performance featured the ____ ballerina in Russia.

a good

b well

c better

d best

28/ The company will become ____ when the new product is released in March.

a profit

b more profitable

c profitably

d more profitably

29/ We are considering hiring the ____ candidate to handle this project.

a has experienced

b more experienced

c most experienced

d most experience than

30/ Sea levels are increasing ____ ever because of global warming.

a more fast than

b fastest

c faster than

d fast

Một cuộn dây dẫn dẹp hình tròn gồm N vòng, mỗi vòng có bán kính R = 10 cm; mỗi mét dài của dây có có điện trở 0,5Q . Cuộn dây được đặt trong một từ trường đều, vectơ cảm ứng từ vuông góc với các mặt phẳng chứa vòng dẩy và có độ lớn 10T giảm điều đến 0 trong thời gian At=10s. Tỉnh cường độ dòng điện xuất hiện trong cuộn dây đó.

Hai dây dẫn thẳng dài song song, cách nhau 15 cm, đặt trong không khí có hai dòng điện cùng cường độ 4 A chạy cùng chiều nhau. Xác định vectơ cảm ứng từ tổng hợp tai M nằm trong mặt phẳng vuông góc với hai dây và cách dây một là 10 cm, cách đây hai là 5 cm.