1.He looked quite healthy though he was ( B )

1.He looked quite healthy though he was ( B )
A.in her seventies B.in his seventies C.before seventy D.seventy -year-old
2.Do you know who was considered ( C) the first TV set?
A.to invent B.inventing C.to have invented D.invented
3.Helen had to shout (D) above the sound of the music.
A.making herself hear B.to make her heard C.making herself heard D.to make herself heard
4.--Where shall we meet?
--Our (A) place,of course,where we usually get together.
A.usual B.popular C,ordinary D.general
5.(B) to such lectures is of no use
A.Listen B.Listening C.Listened D.We listen
答案我给出来了，我要的是解析。

1 可以说是固定用法吧.书本上应该有.
2.意思是：你认为是谁考虑发明电视机呢? 发明电视机,是主动语态,又因为是过去发生的动作对现在的影响,所以用现在完成时,故选C.
3shout后接不定式 make herself heard 意思是使她自己被别人听到,被动态 用heard.其实就是固定用法哈.
4经常见面的地方,只用A项表示经常的意思.
5动名词短语主语的用法.

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