Mr.Smith ________ short stories,but he ________ a TV play th

Mr. Smith always ________ short stories，but he ________ a TV play these days. A．is writing；is writing B．is writing；writes C．writes；is writing D．writes；writes

20.Mr Smith _____ short stories,but he ____ a TV play these days.
A.is writing…is writing B.is writing… writes
C.writes… is writing D.writes… writes
21.I _____ to the cinema.I ______ there every Sunday.
A.go…go B.am going… go C.go… am going D.am going…am going
22.Look,they______ a good time,____ they
A.have…do B.have…don't C.are having…are D.are having… aren’t
23.You ______ about the future now,______ you
A.don't think…don't B.aren't thinking… aren’t
C.don't think… do D.aren’t thinking… are
24.She always¬¬¬¬¬¬¬¬ ______ something whenever she ______.
A .studied…played B.studied…plaied C..studied…plaied D.studied… played
25.He often _____ late in the forest.It _____ me very much.,
A.stayed…worried B.staied… worried C.stayed…worryed D.staied… worried
26.I ______that the boy _____ with no tears in his eyes.
A.noticed… cryed B.noticed… cried C.noticed…cried D.noticed… cryed
27.We _____the floor and _____ all the windows.
A.mopped… cleanned B.moped… cleaned C.mopped…cleaned D.moped… cleaned
28.When I _____ the Children's Palace,the children _____ with joy.
A.visited… jumpped B.visited… jumped
C.visited… jumped D.visited… jumpped
29.______ a sports meet last Sunday Yes ,they ______.
A.Did they have… did B.Did they have… had
C.Had they… had D.Had they… did
30.____ you _____out for a walk after supper Yes,I ______.
A.Did…went…went B.Did… go… went
C.Did… went… did D.Did… go… did
31._____ Jack _____ on with his work or ______ to have a rest?
A.Did… went… stopped B.Did… go… stop
C.Did… went… stop D.Did… go… stopped
32.You gave them a talk two days ago,_____you Yes,I ______.
A.did… did B.did… gave C.didn't… did D.didn't… gave
33.____ your brother _____ a letter to My father.
A.Who… wrote B.What…wrote
C.Who did…write D.What did… write
34.They _____ about the TV news then in the sitting-room.They often ____ such talks
A.talked…had B.talk…have
C.were talking…had D.are talking…have
35.He ______ some cooking at that time,so _____ me.
A.did… heard B.did… didn't hear
C.was doing… heard D.was doing… didn't hear
36.“ _____ you angry then?" "They_ too much noise.”
A.Are…were making B.Were…were making
C.Are…made D.Were… made
37.This time yesterday Jack _____ his,bike.He _____ TV.
A.repaired… didn't watch B.was repairing… watched
C.repaired… watched D.was repairing… wasn't watching

英语选择?
By the time he ______ school,he _____ two short stories.
A.finished,had written B.finished,was writing
C.had finished,had written D.had finished,wrote
正确答案是A,
by the time是过去完成时的时间状语,为什么不选C或D呢?