三.巩固练习
i was ______ work last week, but i changed my mind.
a. to startb. to have startedc. to be startingd. to have been starting
i intended ______ the matter with you, but i had some guests hen.
a. discussb. discussingc. having discussedd. to have discussed
don’t let me catch you ______.
a. do that againb. to do that againc. doing that againd. done that again
there are many kinds of metals ______.
each has its special propertiesb. one has its special properties
c.each having its special propertiesd. having its special properties
it’s pay-day, and they’re waiting ______.
a. for payingb. to be paidc. to be payingd. to have paid
_______ trouble, i’m going to forget the whole affair.
a. then rather causeb. rather causing
c. rather than caused. rather than caused
the brilliance of his satires was ______ make even his victims laugh.
a. so as tob. such as toc. so thatd. such that
children with parents whose guidance is firm, consistent, and rational are inclined ______ high levels of self-confidence.
a. possessb. have possessedc. to possessd. possessing
the worker is ______ in repairing the machine to notice my coming.
a. too busyb. enough busyc. busy tood. busy enough
“what did you do in the garden?”
“i watched my father ______ his motorbike.”
a. to repairb. repairedc. repairingd. repairs
四.答案
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