—Dad, when shall we go to visit my grandpa?
—Grandpa is very busy at present．We'll go to see him whenever __________.
| A．he is convenient | B．he will be convenient |
| C．it is convenient to him | D．it will be convenient to him |
He is color-blind and can’t _____ red from green．
| A．distinguish | B．discover | C．forecast | D．recognize |
_____ I accept that he is not perfect, I do actually like the person．
| A．While | B．Since | C．Before | D．Unless |
I could hear their voice, but I couldn’t _____ what they are saying．
| A．make for | B．make up | C．make out | D．make off |
He was not considered for the job when they _____ choosing a new manager．
| A．set down | B．set out | C．set about | D．set up |
If I had taken part in the 400-meter relay race in the sports-meet, our class _____ the race．I’m _____ weight this year．
| A．might not have won; gaining | B．Would not have beaten; putting on |
| C．can not have defeated; losing | D．must not have achieved; acquiring |