The doctor looked ______ the old man ______.
| A．at…care | B．over…careful |
| C．up…carefully | D．over…carefully |
—I feel a bit hungry now.
—Why not ________for dinner with us?
| A．go | B．did you go |
| C．to go | D．do you go |
May I have a rest? I have already finished ________the report.
| A．write | B．writing |
| C．to write | D．written |
We can't work out the physics problem. Can you tell us ________？
| A．how to do | B．what to do it |
| C．how to do it | D．what should to do |
Try to sing more English songs，and you will find it interesting ________a foreign language.
| A．learning | B．learns |
| C．learn | D．to learn |
We can make a fire ________the room warm so that we can chat for a while.
| A．to keep | B．keeping | C．keep | D．kept |