单项选择题

-What’s your problem - I have lost sight of my mum and dad . I saw them ________ in front of me a moment ago.

A．were walking
B．to have walker
C．walk
D．walking
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单项选择题
I’d ________ them to stay at home the whole day.
A．rather　
B．better
C．prefer　
D．agree
单项选择题
Children are tired of learning often because they are __________to do more than they can.
A．expected
B．su
C．hoped
D．wished
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