In recent years, great changes have taken place in the city of Wenzhou. As we can see, many streets and roads_______.
| A．had been built and rebuilt |
| B．has been built and rebuilt |
| C．have been built and rebuilt |
| D．are being built and rebuilt |
They considereda computer, which was considereda great help in their work．
| A．to buy; to be | B．buying; being |
| C．to buy; being | D．buying; to be |
is reported, Shenzhou VI has returned successfully.
| A．It | B．This | C．That | D．As |
The advanced worker, _________to devote himself to the factory, has succeeded in developing new techniques of production.
| A．determined | B．determining |
| C．having determined | D．to determine |
I can hardly imagine peter ____ across the Atlantic Ocean (大西洋)in five days.
| A．sail | B．to sail |
| C．sailing | D．to have sailed |
Many students insist that the choice of their courses and universities ______ their own interest.
| A．be based on | B．base on |
| C．be basing on | D．base at |