David is________than his brother．So he always makes more mistakes．
| A．careful |
| B．more careful |
| C．less careful |
| D．the most careful |
It’s ___________ to take the subway to visit Paris. It can take you wherever you want to go.
A. convenient B. inexpensive C. crowded
You won’t catch what he said _____ you listen carefully.
A. if B. after C. Unless
Our teacher warned us ______ play tricks _____ others.
A. to; at B. not to; on C. not to; to
We must find a place _______.
A. to live B. living C. to live in
I gave her some advice, but I don’t know ______ she’ll accept it.
A. that B. whether C. Which