单项选择题

The main boyhood (interesting) of (psychologist) Jean Piaget (was) the observation of animals (in their) natural habitat(栖息地).

A．interesting
B．psychologist
C．was
D．in their

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单项选择题

I wish I ______ with you to the movie last night.

A．have gone
B．go
C．had gone
D．could go

单项选择题

Would you please ______ an example for the children

A．make
B．do
C．take
D．set

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