I simply couldn’t understand how it _____ that you did so much work within such a short time．
| A．came about | B．came back | C．came up | D．came along |
The small mountain village we spent our holiday last month lies in is now part of Hubei .
| A．which where | B．where, what | C．that , which | D．when , which |
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 |