Câu hỏi: We’ll have to break the ice on the pond; otherwise the ducks .............. swim.

A. are not able to

B. will not be able to

C. would not be able to

D. would not have been able to

Câu 1: If you’re not coming, ............................

A. we had not been in such trouble

B. you may need to tell me

C. we’d never met

D. you’d be so lucky

Câu 2: Exactly .............. we can replace our soil disappearing through erosion is not known.

A. what

B. how

C. if

D. because

Câu 3: Applicants ................ send in their CVs.

A. asked

B. ask to 

C. are asked to

D. asked to

Câu 4: Send my regards to Lawrence ............................ you see him.

A. if

B. in case

C. whether

D. provided

Câu 5: ......................... any difficulty operating the machine, do not hesitate totelephone our service department.

A. Should you have

B. If you should

C. In case you have

D. Unless you have

Câu 6: What would you do if war .......................... ?

A. break out

B. will break out

C. were to break out

D. breaks out