665. I _______ bacon and eggs every morning.

A. am used to eat　　　　 B. used to eating

C. am used to eating　　　 D. use to eat

664. The old man asked her to leave because he _______-in that chair.

A. used to sit　　　　 B. was used to sit

C. used to sitting　　　 D. was used to sitting

663. “X” _______　 for the unknown quantity.

A. puts　　 B. stands　　　 C. sits　　　　 D. goes

662. By the time he gets home, his aunt ______ for Puerto Rico .

A. will leave　 B. leaves　　 C. will have left　 D. left

661. By the time he retires, Professor Baker ____ for almost forty years.

A. will teach　　　　　　 B. has taught

C. will have taught　　　 D. will be teaching

660. – How did you pay these workers?

　 --- Well, as a rule, they were paid ________.

A. by an hour　　　　 B. by the hour

C. by hours　　　　　 D. by a hour

ABBDA　 AABCB　 DADDB　 CBDCB

659. – How can I help you the most?

　 --- __________.

A. For you to stay　　　　　　 B. To stay

C. By staying　　　　　　　　 D. With your staying

658. My roommate lost a lot of weight ______ every day.

A. to exercise　　　　　 B. for exercise

C. for exercising　　 　　　D. by exercising

657. – Is she older than you?

　 --- Yes, she is older than _________two years.

A. me for　　 B. I am by　　　 C. I for　　 D. me by

656. – Did you feed the baby milk?

　 --- No, he can ________.

A. feed for himself　　　　　 B. feed by himself

C. eat by himself　　　　　　 D. eat for himself