20. He _______ smoking at last.

　　A. gave up B. gave out C. gave in D. gave off

　　21. John was _______ he lay down for an hour before dinner.

　　A. so tired as B. so tired that C. too tired that D. too tired so

　　22. Your answer is different ________ the teacher’s.

　　A. to B. at C. from D. with

　　23. It would be _______ a risk to leave the baby alone.

　　A. running B. passing C. carrying D. obeying

　　24. The fact _______ his health is bad is not true.

　　A. which B. that C. as D. what

　　25. These ______ did unusually well in the contest, so the judges didn’t know whom to give prize to.

　　A. woman singers B. women singers C. women singer D. womans singers

　　26. Man must stop _______ the earth’s atmosphere.

　　A. filling B. wasting C. polluting D. blackening

　　27. We can’t _______ another 100 kilometers any more.

　　A. have B. turn C. make D. reach

　　28. Is Mary ______ to join in us?

　　A. supposed B. exposed C. supported D. indicated

　　29. I want to be told all _______.

　　A. which happen B. which happened

　　C. that had happened D. that had been happened

　　30. We’ve all heard of Thomas Edison, _______ who invented the electric light and many other things.

　　A. man B. a man C. the man D. men

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