21.It is no use ______ your past mistakes.

　　A. regretting B. regret C .to regret D. regretted

　　22.Her husband died in 1980 and had nothing ______ to her, only ______ her fivechildren.

　　A .left; to leave B .leaving; leaving C. leaving ;left D .left; leaving

　　23.I am very busy. I have a very difficult problem ______ .

　　A. to work B. to work out

　　C. to be worked out D. to work it out

　　24.I would appreciate ______ back this afternoon.(NMET)

　　A. you to call B. you call C. your calling D. you’re calling

　　25.Climbing mountains was ______ ,so we all felt ______ .

　　A. tiring; tired B. tired; tiring C. tiring; tiring D. tired; tired

　　26.I saw some villagers ______ on the bench at the end of the room.

　　A. seating B. seat

　　C. seated D. seated themselves

　　27.She was glad to see her child well ______ care of.

　　A. take B. to be taken C. taken D. taking

　　28.It is one of the important problems ______ tomorrow.

　　A. to solve B. to be solved C. solved D. solving

　　29.______ maps properly, you need a special pen.

　　A. Drawn B . Drawing C. To draw D. Be drawing

　　30.There is a river ______ around our school.

　　A. to run B. run C. running D. to be running

　　31.How about the two of us ______ a walk down the garden?

　　A. to take B. take C. taking D. to be taken

　　32.I was fortunate to pick up a wallet ______ on the ground on the way back home,but unfortunately for me, I found my colour TV set. ______ when I got home.

　　A. lying; stolen B .laying; stealing C. lay; stolen D. lying; stealing

　　33.Whth the kind-hearted boy ______ me with my work, I’m sure I’ll be able to spare time ______ with your work.

　　A. to help; help you out B. helping; helping you

　　C. helped; to help you out D. to help; to help you

　　34.Greatly moved by her words, ______ .

　　A. tears came to his eyes B. he could hardly hold back his tears

　　C. tears could hardly be held back D. his eyes were filled with tears.

　　35.——I hope the children won’t touch the dog.

　　——I’ve warned them ______ .

　　A. not B. not to C. not touch D. not do

　　36.I would love ______ to the party last night but I had to work extra hours tofinish a report.(NMET)

　　A. to go B. to have gone C. going D. having gone

　　37.When ______ why he walked in without permission, he just stared at us andsaid nothing.

　　A. been asked B. asked C. asking D. to be asked

　　38.The man kept silent in the room unless ______ .

　　A. spoken to B. spoke to C. spoken D. to speak

　　39.He was often listened ______ in the next room.

　　A. sing B. sung C. to sing D. singing

　　40.Rather than ______ on a crowded bus, he always prefers ______ a bicycle.(NMET)

　　A. ride; ride B. riding; ride C. ride; to ride D. to ride; riding