Everyone in our class played a part _________ our next trip.
| A．in discussing. | B．on discussing. |
| C．in discussion. | D．of discussing. |
Jenny is on holiday now. I wonder.
| A．when she will come back | B．when she came back |
| C．when will she come back | D．when did she come back |
The Spring Festivalin January or February.
| A．celebrates | B．is celebrated | C．celebrated | D．was celebrated |
The teacherscame for a visit are foreigners.
| A．who | B．whom | C．whose | D．which |
Imy homework, I guess I can't join you.
| A．don't finish | B．didn't finish | C．haven't finished | D．won't finish |
They will lose the gamethey try their best,
| A．unless | B．once | C．since | D．after |