There were two boys in the lab, _______ did the experiment successfully.
| A．the clever of whom | B．the cleverer of whom |
| C．the cleverer of them | D．the more clever of them |
Mary used to listen to music that the 0ld times.
| A．called for | B．called on | C．called up | D．called in |
—The place of interest is really beautiful。
—Yes，Mr White a right place.
| A．introduces | B．introduced | C．had introduced | D．was introducing |
It was reported that the problem had been settled without much .
| A．affect | B．affair | C．effect | D．effort |
—I think it’s going to be a11 argument.
—Yes. it could be.
—I wonder we can do about it.
| A．what | B．how | C．when | D．whether |
However hard he tries，the recorder .
| A．didn’t work | B．won’t work | C．isn’t working | D．hasn’t worked |