提问四题英语题.1.-Tom,you look a bit unhappy.Why?-I've tried my bes

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提问四题英语题.
1.-Tom,you look a bit unhappy.Why?
-I've tried my best to finish most of the homework,but the rest ( ) too difficult for me.
A.is
B.are
C.is going to be
D.are going to be
2.What the people in the disaster areas need most at the present( )food,clothes and medicine.
A.be
B.are being
C.is
D.are
3.All ( ) gone to the play ground except David,who is writing an article for the wall newspaper in the classroom.
A.has
B.have
C.had
D.will have
4.-You are always scolding him,aren't you?
-Yeah,what he eats ( ) harm to his health.
A.does do
B.do have
C.did does
D.does have
额不记得说要解析了.......

1.A rest是指homework,homework不可数
2.C 这里指的是一个整体,看成一个类的事物.
3.B all指所有人,all the students 用复数,现在完成时
4.A 第四题我和他们理解不同,do harm to 是固定搭配,对什么造成伤害,
前一个does 表示强调语气,确实的意思 ,没有have harm to 的说法,
—你经常责备他,不是么?
—是的,他吃的东西确实危害他的健康.
再比如 I do have done my home work !我真的做了家庭作业!
I have to go.可译成“我得走了.”
I do have to go.则可译成“我确实得走了.”
可以看出,加了do,有腔调的意思.
在用第三人称时,要主要变换：
He has to go.
He does have to go.
即第二句由于加了does,原来的has就要改为have--动词原形.

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