1.Mr Li required the computer equipment referred ____C____ used in every classroom.
A.should be B.have to be C.to be D.to being
2.—Yang Liwei has won great honour for our country.
—Who is Yang Liwei?
—What a question!It is surprising ____C____ the first spaceman in China.
A.you didn’t know our national hero B.to you not to know him
C.you should know nothing about D.you knew nothing about him
3.—What courses are you going to do next term?
—I don’t know.But it’s about time ___B_____ on something.
A.I’d decide B.I decided
C.I decide D.I’m deciding
请解释一下为什么要选那几个答案.
另外麻烦帮忙翻译一下第一题句子的意思.