Mother told Jim to watch the milk until it boiled and then _____ off the gas.
| A．turn | B．turning | C．turned | D．having turned |
---- What do you know about the population of China?
---- It _____ over 1,200 million and 80 percent of it _____ peasants.
| A．is; is | B．are; are | C．are; is | D．is; are |
It will take _____ time to finish the project.
| A．one and a half months’ | B．a month and a half |
| C．one and a half month’s | D．a month and half’s |
It is not rare in ____ that people in ____fifties are going to university for further education.
| A．90s, the | B．the 90s, / |
| C．90s, their | D．the 90s, their |
Has ____ how many spies we caught during the war ____ up to now?
| A．it been declared; have been set free |
| B．it declared; have been set free |
| C．they declared; has been set free |
| D．they declared; have set free |
You’ve missed your ______ to speak and you have to wait for another round.
| A．turn | B．chance | C．order | D．opportunity |