单项选择题

Carey didn't go to the party last night because she ______ the baby for her sister until 9:30.

A．must have looked after
B．would have to look after
C．had to look after
D．should have looked after
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单项选择题
Did you mean I should keep the receipt I'm afraid I have ______ .
A．run it over
B．torn it up
C．taken it apart
D．shaken it off
单项选择题
The boy ______ when he said that he ______ the eggs ______ by the hen in the closet before he ______ down to have a rest.
A．was lying, had laid, laid, lay
B．had laid, lay, laid, was lying
C．lay, was lying, lain, lay
D．laid, lay, lam, lies
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