The little boy still needs the ______ 20 dollars to do with some things ______.

　　A. remaining; remained to be settled

　　B. remaining; remaining to be settled

　　C. remained; remained to settle

　　D. remained; remaining to settle

　 The scientists were waiting to see the problem _____.

　　A. settle　　 B. to settle   C. settled　　D. settling

With a lot of difficult problems_____, the newly-elected president is having a hard time.

A. settled 　　　 B. settling 　　　　 C. to settle 　　　 D. being settling

One cannot _________ down to reading when he is very angry.

A. settle　　　 B. put　　 C. sit　　　 D. lie

The way they talked _______ the problem seemed impossible.

A. about settling　 B. to settle　 C. about to settle D. of settling