单项选择题

You should know better than ______ your little sister at home by herself.

[A] to leave
[B] leaving
[C] to have left
[D] left

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单项选择题

We'll ______ you as soon as we have any further information.

[A] relate
[B] communicate
[C] talk
[D] notify

单项选择题

______ touched me most was that the poor old lady donated all her savings to support one dropout.

[A] That
[B] It
[C] Which
[D] What

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