The Changjiang River has been polluted badly and is not good _______．
| A．to swim it | B．to be swum in |
| C．to swim in it | D．to swim in |
_____ leaves the room last ought to turn off the lights.
| A．Anyone | B．The person | C．Whoever | D．Who |
You can’t imagine ______ when they received these nice Christmas presents.
| A．how they were excited | B．how excited they were |
| C．how excited were they | D．they were how excited |
My new pen ______. Who ______ have taken it?
| A．has been disappeared; can |
| B．has disappeared; could |
| C．is missing; should |
| D．has been lost; may |
— David hasn’t come yet.
—I think he will ______ soon, for he means what he says.
| A．turn on | B．turn off |
| C．turn down | D．turn up |
Many students_______from the new library since it was open to all.
| A．benefited | B．were benefited |
| C．have been benefited | D．have benefited |