She uses her car _____________ for driving to work.

. — What’re you going to do to protect the environment? — Plant trees on side of the river.

Excuse me, Mum. When can we have dinner?—Not until it in half an hour.

You must be excited about going to America for schooling. —______, but I am afraid I can’t do well because my English is poor.

We will fly a kite if your homework _______ before 3 o’clock.