1.Dr Smith has been working for four hours.He____very tried.

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1.Dr Smith has been working for four hours.He____very tried.
A.has to be B.would be C.must be D.can be
2.Tom has to look after his grandma,do a lot of housework and do his homework after school.Oh,that,s too___for a twelve-year-old boy.
A.more B.many C.much D.lot
3.Is your school far from your home?No.It____me only 10 minutes____to school.
A.takes:to walk B.takes;walking C.spends;to walk D.spends;walking

1.C must be: 一定
has to be: 不得不； would be : 将会； can be: 可能会
一直工作了四个小时,肯定很累了
2. C much: 形容量的多少 too much: 太多,是搭配.
more: 没有比较的感觉,并且没有too more； many: 修饰可数名词, too many :太多,修饰可数名词； lot:可以修饰可数和不可数名词, too lot:没有
3. A take sb some time to do sth: 花费某人多少时间做某事; take 的主语为it
spend 的主语必须是人 sb spend some time/ money on sth./ in doing sth

She has been working for 20 hours Sam has been skating for four hours.改为否定句对画线部分提问 she has been working for 2 hours for 2 hours 画线 ① he has been working for five hours for five hours用它提问、 She has been working for 20 hours【否定回答】--- She --- working f He has been working for more than 5 hours．________ he is so ( )be tried now after working for eight hours. Next is Sam ,and he has been skating for four hours 1.Dr.Smith is ____leading expert on stress who has been doin .Mr.Smith has been working in China ___________ 2000. 1.My uncle has been collecting stamps for four years. I skated for four hours与I have been skating for four hours的区