Wind power is an ancient source of energy we may return in the near future.
A．on which B．by which C．to which D．from which
When changing lanes, a driver should use his turning signal to let other drivers know .
A．he is entering which lane B．which lane he is entering
C．is he entering which lane D．which lane is he entering
One reason for her preference for city life is she can have easy access to places like shops and restaurants.
A．that B．how C．what D．why
the city center, we saw a stone statue of about 10 meters in height.
A．Approaching B．Approached C．To approach D．To be approached
you may have, you should gather your courage to face the challenge.
A．However a serious problem B．What a serious problem
C．However serious a problem D．What serious a problem
Lucy has a great sense of humor and always keeps her colleagues with her stories.
A．amused B．amusing C．to amuse D．to be amused
