We were told that we should follow the main road _we reached the bus station .
| A．whenever | B．until |
| C．while | D．as soon as |
While she _____ TV, someone _______ at the door.
| A．watch, knocked | B．was watching, knocked |
| C．watching, knocking | D．was watching, is knocking |
---Can you tell me __________?
---Yes. She came here on foot.
| A．where Kate came from | B．how Kate came here |
| C．when Kate comes here | D．why Kate didn’t come here |
The news made me ________.
| A．happily | B．crying | C．disappointed | D．exciting |
----How are you going, buddy?
----________. A little busy, though.
| A．Can’t be worse | B．By train | C．Not too bad | D．on my own |
Scientists from different countries are trying to_______ a good way to solve the energy problem.
| A．keep up with | B．come up with | C．catch up with | D．meet up with |