A good teacher must be able to help his students learn the subject with great interest ______ he reaches the last minute of the class.
A. when B. unless C. until D. after
--I’m exhausted. I ______ on a design day and night.
--You’d better have several days off after finishing it. Otherwise you might break down.
A. work B. worked
C. had worked D. have been working
-But for your timely warning, we ______ into great trouble.
--You know we’re friends.
A. would get B. must have got
C. would have got D. couldn’t have got
--Alice won’t join in our discussion tonight.
--Oh, she ______. We have already put it off.
A. mustn’t B. can’t
C. shouldn’t D. needn’t
I will appreciate it ______ you can change your plan a little bit to make it more workable.
A. so B. if C. since D. although
Unless you have planted something, you won’t be able to know the pleasure of watching the thing you have planted ______.
A. growing B. grown C. to grow D. to be grown
