21．—I’m scared by those piles of homework.
—Don’t worry. there is much work, we’ll still have a great time.
A．Even if B．As though C．In case D．If only
22．By the time the doctor has made your lung checked, you_________ the result.
A．gets B．has been got C．will get D．is getting
23．—Take it easy! Don’t be so hard on yourself. Haven’t you beard “Failure is the mother of success”?
—
A．So what? B．No way. C．What for? D．Thanks.
