烦请告诉我正解和原因,就是简单分析一下为什么选这个,1.Bill（）thehomework,butheforgot.A.hadtofinishB.oughttohavefinishedC.oughttofinishD.shouldfinished2.Couldyoutellme().A.what`sthematterwiththeradio?B.

Question

烦请告诉我正解和原因,就是简单分析一下为什么选这个,
1.Bill（ ）the homework,but he forgot.
A.had to finish
B.ought to have finished
C.ought to finish
D.should finished
2.Could you tell me ( ).
A.what`s the matter with the radio?
B.what`s the matter was with the radio
C.when will the meeting begin?
D.when the meeting begin?
3.He was seen( )the room.
A.enter
B.to enter
C.come into
D.to enter into
4.A car usually runs( ).
A.at 30kilometers an hour
B.30 kilometers an hour
C.in 30 kilometers an hour

Answer 1

1. B.ought to和should都可以表示本应该做某事,但是后面fogot是过去时,即对过去事实的猜测,所以前句应该用过去完成时ought to have finished.而A的have to 是“不得不...”,这里与语境不符.
2. A.could you tell me 引导的宾语从句,从句的语序用陈述句语序,即“引导词+主语+谓语+……”.C、D的正确形式应为：when the meeting will begin / begins.B明显语法错误.
3. B.be seen doing / to do. 进入某一具体地点时用enter,enter into用于比较抽象的名词,有卷入...活动,境况,事件之意
4. B.run... an hour 时速...,不用加介词.