单项选择题

Could you ________the baby while I go out shopping, please

A． look at
B． see
C． watch
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单项选择题
The Johnsons have been on holiday ________ the end of June.
A． since
B． for
C． at
单项选择题
When I got to the railway station, the train _______ .
A． left
B． had left
C． has left
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