题目内容

He died suddenly , ________ three kids.

A. leave
B. left
C. leaving
D. had left

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When ______ for a formal meal, you should dress smartly.

A. invites
B. invited
C. invite
D. inviting

_______ you’re a policeman, you should have the responsibility to protect citizens.

Although
B. Therefore
C. Though
D. Since

He acts as if he __________ me.

A. known
B. know
C. knew
D. knows

She talked about Tibet as if she ________ there before.

A. been
B. had been
C. has been
D. was

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