We have ______ up early in order to catch the early bus.

I am sorry you’ve been waiting so long, but it will still be some time __________ Brain gets back from his holiday.

____________you write, ________ you make .

How long can we read in the library? —It ______ from 8 a.m. to 6p.m..

What ________ if there ______ no water or air on the earth?