If the way ___ you think of is not good enough, you can learn the way____ the top students deal with their study.
I’d rather have a room of my own, however small it is, than ___ a room with others.
Some researchers believed that there is no doubta cure for AIDS will be found.
You’d better _____ some money for special use.
Many studentspreparing for the midterm examination.
________ from space, the earth , with water_______ seventy percent of the surface , looks like a blue ball.