Which is _____ difficult, this one or the other two?
| A．more | B．the more |
| C．most | D．the most |
Would you please drive more ________, David? The train is leaving soon.
| A．slowly | B．carefully | C．easily | D．quickly |
After a serious illness, he finally _______ how important his health is.
| A．meant | B．realized | C．added | D．impressed |
It is our ________ to look after our parents when they get old.
| A．duty | B．habit | C．problem | D．decision |
Our teacher is very kind to us. So we regard her ________our best friend.
| A．on | B．to | C．as | D．at |
He was ill , _______he still went to school on time.
| A．but | B．and | C．or | D．∕ |