He____know the answer, but I’m not sure.
| A．maybe | B．may be | C．may | D．must |
strong the wind is! I'm afraid we can’t go to the sea today．
| A．What | B．How | C．What a | D．How a |
Don’t so often.． It’s bad for your health．
| A．get up | B．show up | C．look up | D．stay up |
The price of this mobile phone is of the two．
A. cheaper B．lower C．the cheaper
our surprise，his eyes are full tears.
A．To；in B. In；with C．To；of
---How do people get in touch with each other?
---By messages online．
A．send B．sending C．sent