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几道高中选择题,请高手帮忙解答

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几道高中选择题,请高手帮忙解答
1.I scored the lowest mark in my class,i_____ to learn Maths well.
A.am determined B.made a decision
为什么选A不能选B
2.I had a hard time _____him to join us.
A.to persuade B.in persuade C.on persuading D.persuading
3.There are three women in the office ___to see you.
A.to ask B.to be ask C.asking D.being asked
为什么选D
4.I hate ___a heavy bag when I was walking.
A.carry B.to be carrying C.carrying D.being carrying
5.AIDS is said ___the biggest health challenge to both men and women in that area over the past few years.
A.that it is B.to be C.that is has been D.to have being
1,be determined to 是下定决心的意思,而made a decision是作出决定的意思,不一定有决心去作,显然前者的语气更符合题意.
2,have a hard time后面加to do形式或者ing形式,都是好不容易,花了好大工夫的意思,不定时表示没做,要去做的,而ing形式表示已经做过,从had可以看出说是过去做过的,应该用ing形式,所以选persuading
3,being asked,进行时,被动语态,比如例句,I was asked to do sth.
4,hate +doing,carry的动作是I主动发出,用主动语态,C正确.
5,由over the past few years判断,用现在完成时,C正确.