---Sorry, Jane．I took your schoolbag _____.
---It doesn’t matter.
| A．by mistake | B．by mistakes |
| C．by accident | D．by accidents |
He doesn't tell me when he_______ . I'll telephone you as soon as he______.
| A．will come;comes | B．will come; will come |
| C．comes; will come | D．comes; comes |
——Who is knocking at the door?
——It ______ Mr. Black, because he_______Washington.
| A．can't be;has gone to | B．may be;has been to |
| C．must’t be;has gone to | D．may be;went |
In winter people usually keep flowers in their houses to ___them from the cold.
| A．produce | B．provide | C．protect | D．Plant |
—— I feel tired and sleepy. ——Why not _______?
| A．to stop to work | B．stop to have a rest |
| C．stop having a rest | D．to stop to have a rest |
The picture shows us _______ in Nanjing in the past.
| A．what everyday life was like | B．what was everyday life like |
| C．how everyday life was like | D．how was everyday life like |