21）I didn’t know _____ him or not. a. whether to help b. if to help c. to help d. that if I should help
22）“You didn’t hear us come in last night. That’s good.” “We tried ______ noisy.” a. to not be b. not to be c. being not d. not being
23）Let his words ________. a. remembered b. to be remembered c. be remembered d. remember
24）Some of the experiments ______ in the book are easy to perform. a. being described b. described c. to be described d. having been described
25）The question _______ tomorrow is whether income tax should be increased. a. to be debated b. to debate c. debated d. that it will be debated
26）Electric charges _______ in a circuit can do work. a. flowed b. flowing c. to flow d. having flowed
27）They wanted the power station ______ as soon as possible. a. to be set up b. set up c. being set up d. to have been set up 来源：www.examda.com 28）The teacher often has his students ______what he tells them. a. repeat b. repeating c. to repeat d. repeated
29）The police inspector spoke to the little girl kindly ______ her. a. not to frighten b. in order to not frighten c. so as not to frighten d. for not frightening
30）The robber was brought to the judge, ______. a. his hands were fast tied b. his hands to be fast tied c. his hands having been fast tied d. his hands fast tied
31）_______ by the police, the kidnappers had no choice but to surrender. a. To be surrounded b. Surrounded c. Having surrounded d. Surrounding
32）________, they went swimming. a. Being a hot day b. It was a hot day c. Due to a hot day d. The day being hot
33）________ plastics, the machine is light in weight. a. To make of b. Having made of c. To be made of d. Made of
34）Rather than _______everything to the last minute, he always prefers to start early. a. to leave b. leaving c. leave d. leaves 来源：www.examda.com 35）Good-bye, Mr. Jones. I am pleased ______you. a. to meet b. meeting c. to have met d. to have been meeting
36）He ______abroad but he was suddenly taken ill. a. was going b. was to go c. was to have gone d. is to go
37）He had us ______ all through the meal. a. laugh b. laughed c. to laugh d. laughing
38）_____to continue his studies, James quitted school. a. Not wishing b. Not to wish c. Having not wished d. Wishing not
39）Such ______ the case, there wee no grounds to justify your complaint. a. was b. had been c. would be d. being
40）When _______the education systems of China and Britain, the professor gave no comment. a. being asked to compare b. asked him to compare c. asking him to compare d. asked to compare
形容词副词：同级、比较级、最高级：比较的对象，that of mine 不规则形容词 介词的搭配问题