Some birds fly_______________in winter and some stay in the north.
| A．south | B．the south | C．in the south | D．to south |
I don’t know whether you happen ____ it, but I’m going to study in the U.S.A. this September.
A. to be heard B. to be hearing C. to hear D. to have heard
“Do you have anything more ______, sir?” “No. You can have a restordo something else.”
| A．typing | B．to be typed |
| C．typed | D．to type |
Both of my parents insisted _______ a computer for me, but I don’t think it is necessary.
| A．to buy | B．buying |
| C．on buying | D．in buying |
Not only should you get used ______ under difficult conditions but you also you pay more attention ______ your work well.
| A．to work, to do | B．to working, to doing |
| C．to work, to doing | D．to working, to do |
Once your business becomes international, _____ constantly will be part of your life.
| A．you fly | B．your flight |
| C．flight | D．flying |