All our teachers demand that we ___________.
| A．worked hard | B．work hard | C．will work out | D．should be worked hard |
. Rain and freezing temperatures ____ to make snow.
| A．combined | B．combine | C．combine with | D．combined with |
. The express No.12_____ at two pm.
| A．reaches | B．gets in | C．cuts in | D．knocks |
Our city has changed a lot; who can tell what it will be like in ___ ten years?
| A．other | B．next | C．more | D．another |
She fell and hit her head, but she ___ to be all right now.
| A．seemed | B．appears | C．has | D．seems |
____ his telephone number, she had some difficulty getting in touch with Bill.
| A．Not knowing | B．Knowing not |
| C．Not having known | D．Having not known |