— It’s surprising that your brother Russian so quickly.
— He hasn’t lived there very long.
| A．dressed up | B．set up |
| C．picked up | D．made up |
Shall Mary come to the concert with us？
－Notshe has finished her paper．
| A．since | B．once | C．when | D．unless |
Water, _______enough, can change into vapour quickly.
| A．when heated | B．heating | C．though to be heated | D．when is heated |
The man stopped from time to time_______whether he was being followed.
| A．as if found | B．as to find | C．as if to find | D．when found |
Doctors have said that as many as 50% of patients don’t take medicine_______.
| A．like directed | B．to be directed | C．as directed | D．so that directed |
You may take them all home_______.
| A．if possible | B．if can | C．unless so | D．even if you can |