There is ________ in population that a food shortage is caused.
| A．so rapid an increase | B．such rapid an increase |
| C．such rapid increase | D．so a rapid increase |
--–Can I speak to Mr Wang, please?
--________.
| A．Who are you ? | B．I’m Wang | C．Speaking | D．Are you Zhang |
-----Have you got any particular plans for the coming holiday?
----- Yes, _______, I’m going to visit some homes for the old in the city.
| A．If ever | B．If busy | C．If anything | D．If possible |
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 |