问题

There was ______ time _____ Chinese used foreign oil
A:a; when
B:a; while
C:/; when
D:/; while
B:a; while
C:/; when
D:/; while
正确答案是:
同类题型
___________ do you watch TV every week —Three times.
_______ go to the cinema together with me—- Good idea!
Thereis a great deal of evidence that musicactivities engage different parts of the brain.
Smell the flowers before you go to sleep, and you may just______ sweet dreams
What time would you like me to this evening for the concert? — I think 6:30 will be OK.