By the end of last week, we __________ a satisfactory solution to the problem.
| A．have found | B．will be finding | C．had found | D．found |
The man showed us so heavy a stone _______ no man can lift.
| A．that | B．as | C．which | D．and |
______ he met with the difficulty did he realize the importance of our help.
| A．Even though | B．Never until | C．Only before | D．Ever since |
There is not one of us wishes to help you . We are doing our best .
| A．who | B．that | C．as | D．but |
—Alice, you feed the bird today； ？ —But I fed it yesterday.
| A．do you | B．will you | C．didn’t you | D．don’t you |
Our school is no longer ______ is was 10 years ago, _______ it was not well equipped.
| A．what; which | B．that; which | C．what; when | D．that; where |