简单的英语单选题,请解析一下

简单的英语单选题,请解析一下
1.____ had made great contributions to science is a fact.
A.What heB.Which heC.HeD.That he
2.The professor paused as if ___ his students to ask questions on the point he had just made.
A.expecting B.to expect C.expected D.to have expected
3.She longed to visit Italy,___ she often dreamt about it.
A.so seriously that B.so eagerly that
C.to such an extent that D.so anxiously that
4.He ordered the work ___
A.started at once B.to be started at once C.to start at once D.at once starting
5.Training is provided,so no ___ experience is required for the job.
A.previous B.principal C.following D.precious
6.---Where ___ the recorder?I can't see it anywhere.
---I ___ it right here.But it's gone!
A.did you put;have putB.have you put;put
C.had you put;was puttingD.were you putting;have put
7.___ the book,he found out some answers to this question.
A.As he reading B.At his reading C.As reading D.On reading
8.____,the next problem was how to make a good plan.
A.Having made the decision
B.Has the decision been made
C.The decision having been made
D.The decision has bee made
9.I am very grateful to you for what you've given me and ___ you have done for me.
C为什么不对?
A.which B.that C.all what D.all that
10.Jean dosen't want to work right away because she thinks that if she ___ a job she probably wouldn't be able to see her friends very often.
A.would have to get B.were to get C.has got D.could have got