By the time he retires, professor Baker _____ for almost forty years．
| A．will have taught | B．had taught |
| C．has taught | D．is teaching |
—I’m going to cut the big tree down? —What ________ ?
| A．by | B．to |
| C．with | D．at |
So far, several ships have been reported missing ________ the coast of Bermuda.
| A．off | B．along |
| C．on | D．around |
________ her hair getting gray, she has decided to have it dyed.
| A．As | B．For |
| C．With | D．Though |
—I like coffee with nothing in it. What about you?
—I prefer coffee ________ sugar.
| A．to | B．for |
| C．with | D．than |
So far, several ships have been reported missing ________ the coast of Bermuda.
| A．off | B．along |
| C．on | D．around |