Henry can’t attend the party _____ at Tom’s house at present because he is preparing the speech at the party _____ at Marie’s house tomorrow.
| A．held; being held | B．to be held; to be held |
| C．to be held; held | D．being held; to be held |
--- What did the manager say at yesterday’s meeting?
--- So you______ to him carefully.
| A．won’t listen | B．weren’t listening |
| C．hadn’t listened | D．haven’t listened |
--- Did Jack come back early last night?
--- Yes. It was not yet eight o’clock ______ he arrived home.
| A．before | B．until | C．when | D．af ter |
In some countries citizens are ______ to vote, and if they don’t they get fined.
| A．demanded | B．suggested | C．prevented | D．required |
We’ve been looking at houses but haven’t found ______ we like yet.
| A．them | B．ones | C．it | D．one |
______is known to us all, only the theory ______ on practice can be practical.
| A．Which; base | B．Which; based | C．As; based | D．As; basing |