30.They ______ be at home. You see, the door is locked from the outside.
—Could we see each other at 9 o’clock tomorrow morning? —Sorry, let’s make it ______ time.
—Having many helpers makes a task easier and faster to complete. —I think so. _______ .
I’dliketoknow______Chinese.
Was it 80 years before Christopher Columbus crossed the Atlantic ______ Zheng He hadsailed to East Africa?
Time should be made use ______ meaningful things.