.
By the time he comes back, I’m sure we ________ all these rooms of the lab. Therefore, he doesn’t have to return.
| A．have cleaned | B．will be cleaning |
| C．will have cleaned | D．have been cleaning |
much work you have to do every day，do get enough sleep．
| A．However | B．Whichever | C．Whatever | D．Whenever |
How did itthat the child dropped out of school?
| A．come in | B．come about | C．come across | D．come on |
The government has handed out all thefood and clothes to the victims．
| A．reflected | B．abandoned | C．donated | D．rented |
We want to buy the same computersare being used in your office．
| A．which | B．as | C．that they | D．as they |
—What's yourof Frank as a boss?
—Honest．
| A．impression | B．influence | C．respect | D．attitude |