Câu hỏi: Take John's address with you, ................... you have time to see him whenyou’re in London.

A. if

B. unless

C. in case

D. so long as

Câu 1: Exactly .............. we can replace our soil disappearing through erosion is not known.

A. what

B. how

C. if

D. because

Câu 2: If only you’d come, ...............................

A. I’ll be the happiest girl alive 

B. I’ll understand why

C. I’d have had a lovely time        

D. I would look forward to it

Câu 3: Hamburgers ...................... favorite in America in the early century.

A. became

B. becomes

C. has become

D. was become

Câu 4: If you'd told me you were coming, .............................

A. I can get some food in

B. I’d have found us something to eat

C. I made a lovely dish

D. I’ll buy some more food

Câu 5: ...................... we would have lost the match.

A. Unless the goal-keeper had played well

B. But for the goal-keeper’s heroics

C. If it were not for the goal-keeper

D. Because the goal-keeper was good

Câu 6: 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