题目内容

—Did Jack come back early last night?—Yes. It was not yet eight o’clock

A. before
B. when
C. that
D. until

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Allow children the space to voice their opinions, _______ they are different from your own.

A. until
B. even if
C. unless
D. as though

Jenny was very sad over the loss of the photos she had shot at Canada, this was a memory she especially treasured.

A. as
B. if
C. when
D. where

"You can't have this football back —— you promise not to kick it at my cat again," the old man said firmly.

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

_____ environmental damage is done, it takes many years for the ecosystem (生态系统) to recover.

A. Even if
B. If only
C. While
D. Once

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