题目内容

When to leave __ not been decided.

A. has
B. have

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What he said and what he did __ always different.

A. were
B. was

The novelist and poet ___ going to Europe next year.

A. is
B. are

The United States __ found in 1776.美国成立于1776年。

A. was
B. were
C. is
D. are

Ten minutes___ enough.

A. is
B. are

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