It took me a long time before I was able to fully appreciate what they __________ for me.
| A．had done |
| B．did |
| C．would do |
| D．were doing |
Someone is ringing the doorbell. Go and see _______.
| A．Who is he | B．who he is | C．Who is it | D．who it is |
When he was there, he _____ go to that coffee shop at the corner after work every day.
| A．would | B．should | C．had better | D．might |
One advantage of playing the guitar is _____ it can give you a great deal of pleasure.
| A．how | B．why | C．that | D．when |
What you said just now ______ me of that American professor.
| A．informed | B．reminded | C．memorized | D．mentioned |
Looking up, I saw that some children _____ rags were looking at me silently as I ate.
| A．by | B．in | C．with | D．on |