题目内容

_______I saw the computer, I showed great interest in it.

At first
B. For the first time
C. Until
D. The first time

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I often visited Tian’an Men Square _______I was staying in Beijing.

A. until
B. during
C. while
D. throughout

I knew Mr. Green _______I knew Mrs. Green.

A. long before
B. before long
C. long ago
D. after long

They waited _______it was dark before leaving, ______they didn’t want anyone to see them leave.

A. since; because
B. until; as
C. unless; for
D. so; because

I will never stop _______they may not like it.

A. no matter how
B. how
C. what
D. though

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