---Ms. Steen is leaving soon to go back to America.Shall we have a party for her?
----Sounds great! If we________,all our classmates will come.
| A．do | B．have | C．will do | D．will have |
Who saw it ______ at that time?
| A．happen | B．happened | C．happens | D．to happen |
More and more people have realized that we won’t have cleaner water to drink unless something _______soon.
| A．is done | B．was done | C．will be done | D．to be done |
We have to ____the sports meeting till next Friday because of the bad weather
| A．put up | B．put away | C．put on | D．put off |
They are talking about the movie __they watched yesterday
| A．/ | B．whose | C．what | D．whom |
_____interesting work it is to teach children！
| A．How | B．What | C．What an | D．How an |