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 ................... a pet bird, you’ll have to buy a cage, too.

A. buy

B. will buy

C. bought

D. had bought

Câu 2: .............................. if I were you.

A. These wires would look dangerous

B. You should not touch these wires

C. I would not touch these wires

D. These wires were dangerous to you not to me

Câu 3: Their popularity ................ much more after the Second WorldWar.

A. grew

B. grow

C. is grown

D. has grown

Câu 4: Peasants spend most of their time on the ground, ...................... many speciesstay in trees at night.

A. if

B. though

C. because

D. as well as

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: If it ..................... last weekend, we would have gone skiing.

A. snowed

B. would have snowed

C. had snowed

D. would snow