—Listen! Somebody is ___________ at the door.
—Don’t answer the door! Mom doesn’t let us do it while she is out.
A. standing B. knocking
C. sitting D. greeting
—Tom! I looked for you everywhere at the party last night.
—Oh， I ___________ to the party.
A. am invited B. was invited
C. am not invited D. wasn’t invited
I will never forget the old days ___________ I spent with my grandmother in the village.
A. which B. when C. who D. whom
—Look! The light in Mr. Brown’s office is still on. He ___________ be working there.
—It ___________ be him. He has gone to America.
A. must；mustn’t B. can；mustn’t
C. must；can’t D. can；can’t
It is a pity that we have to ___________ the school trip because of the rainy days.
A. set off B. go off C. put off D. take off
Mr. Green will arrive here and give us a speech ___________ the morning of December 22nd.
A. in B. on C. at D. before
