30.It was about 600 years ago__________the first clock with a face and an hour head was made.

A.that　　　　　　　　　　　　　　　　　　　　　　　 B.until

C.before　　　　　　　　　　　　　　　　　　　　　　 D.when

29.Was it in 1969__________ the American astronaut succeeded__________ landing on the moon?

A.when;on　　　　　　　　　　　　　　　　　　　　 B.that;on

C.when;in　　　　　　　　　　　　　　　　　　　　　 D.that;in

28.It was in Beihai Park__________they made a date for the first time__________ the old couple told us their love story.

A.that;that　　　　　　　　　　　　　　　　　　　　 B.where;when

C.that;when　　　　　　　　　　　　　　　　　　　 D.where;that

27.It is in Qingdao__________ you are going to pay a visit to__________this kind of washing machine is produced.

A./,that　　　　　　　　　　　　　　　　　　　　　　 B.where,which

C./,where　　　　　　　　　　　　　　　　　　　　　　　　 D.that,which

26.-__________was it__________they discovered the entrance to the underground palace?

-Totally by chance.

A.How;that　　　　　　　　　　　　　　　　　　　　 B.what,that

C.when,when　　　　　　　　　　　　　　　　　　 D.where,that

25.__________she realized it was too late to go home.

A.No sooner it grew dark than　　　　　　 B.Hardly did it grow dark that

C.It was dark after　　　　　　　　　　　　　　　 D.It was not until dark that

24.Is__________three hours__________ the boy__________ family is poor to come to school on foot?

A.it;that;whose　　　　　　　　　　　　　　　　　 B.it;when;that

C.it for;that it takes;whose 　　　　　　　　 D.it;that it takes;whose

23.- __________Mr Bardon changed his mind to take part in the movement?

-After he listened to the speech by Mr.King.

A.When was that it　　　　　　　　　　　　　　 B.when was it that

C.when was that　　　　　　　　　　　　　　　　 D.when was it

22.Was it in the village__________we used to live in__________ the accident happened?

A.where;that　　　　　　　　　　　　　　　　　　　 B.which;that

C.that;where　　　　　　　　　　　　　　　　　　　 D.where;which

21.-Was it because the traffic was very heavy during the rush hour__________you were late again?

-Well,I'm afraid so.

A.when　　　　　　　　　　　　　　　　　　　　　　 B.why

C.that　　　　　　　　　　　　　　　　　　　　　　　　 D.which