-It’s 10 o’clock now. I must go. -It’s raining outside. Don’t leave it stops. [ ]A. w——青夏教育精英家教网——

—It’s 10 o’clock now. I must go.
—It’s raining outside. Don’t leave ________ it stops.

A. when
B. since
C. while
D. until

Learn to think ________ we are young, or we may never learn.

A. during
B. when
C. before
D. after

My brother and I look different ________ we are twins.

A. unless
B. as
C. though
D. because

I have been trying my best to study English ________ I want to have a chance to be a volunteer for the Beijing Olympics.

A.until
B. because
C. though
D. when

I will never forget that terrible accident ________ it happened so long ago.

A. only if
B. even though
C. only when
D. ever since

He met many problems ________ he was going over his lessons.

A. before
B. as soon as
C. since
D. while

I won't take part in the party ________ Joe invites me.

A.if
B. when
C. unless
D. because

Tom wants to be a professor when he _________.

A. grow up
B. growing up
C. grows up
D. grew up

He was so tired that he fell asleep ___he went to bed.

A. as if
B. even though
C. ever since
D. as soon as

What do you do when it ___?

A. snowing
B. snow
C. is snowy
D. is snow

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