1.() does the first class begin?At 7:40.A.How long B.Where C.When 2.Mr.Smith () here for about two hours.A.has left B.left from C.has been away from 3.() of them has an English dictionary.A.Every B.Both C.Each 4.() is really hard () them to climb u

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1.()doesthefirstclassbegin?At7:40.A.HowlongB.WhereC.When2.Mr.Smith()hereforabouttwohours.A.hasleftB.

1.() does the first class begin?At 7:40.A.How long B.Where C.When 2.Mr.Smith () here for about two hours.A.has left B.left from C.has been away from 3.() of them has an English dictionary.A.Every B.Both C.Each 4.() is really hard () them to climb u
1.() does the first class begin?
At 7:40.A.How long B.Where C.When 2.Mr.Smith () here for about two hours.A.has left B.left from C.has been away from 3.() of them has an English dictionary.A.Every B.Both C.Each 4.() is really hard () them to climb up the mountain at night.A.This;to B.It;for C.It;to

1.() does the first class begin?At 7:40.A.How long B.Where C.When 2.Mr.Smith () here for about two hours.A.has left B.left from C.has been away from 3.() of them has an English dictionary.A.Every B.Both C.Each 4.() is really hard () them to climb u
1.问时间,用when 2.有for two hours.left是非延续性动词,不能说“离开”这个动作做了两个小时.所以用C,完成时态 3.后面是has,单数,而every不能当名词使用,后面不能跟of.所以用 each 4.it is hard for someone to do sth.用C