Câu hỏi: We …… a lot important scientific discoveries in 2050.

A. have

B. will have

C. had

D. has had

Câu 1:  Tobacco has bad effects ……… our health.

A. on

B. from

C. at

D. of

Câu 2:  I am looking forward ……….. seeing you.

A. to

B. for

C. on

D. at

Câu 3: We will send these letters to him when we …. in London.

A. will arrive

B. arrive

C. arriving

D. have arrived

Câu 4:  What is your purpose ……….. learning English?

A. of

B. to

C. for

D. on

Câu 5: ………. each of you ready for the test?

A. is

B. are

C. have

D. do

Câu 6: “Where are the letter and the postcard?” They …… on the table.

A. were

B. are

C. is

D. have been