30. The research is so designed that once ______ nothing can be done to change it.
A. begins B. having begun C. beginning D. begun
29. --What’s the terrible noise?
--The man next to the door ______ his new house.
A. decorating B. has been decorating C. is decorating D. decorates
28. These books were so interesting that they ______ in no time.
A. sold B. had been sold C. were sold D. would sold
27. The school life he was used to ______ a lot since five years ago.
A. changes B. changing C. has changed D. change
26. It was in the deep forest ______ the villagers hunted the endangered animal.
A. that B. where C. which D. what
25. Nokie, one of the mobile brands that ______ accepted by the customers these years, is suffering a great pressure in the market of China.
A. have been B. has been C. was D. were
24. Only in this way ______ whether an animal has been trained.
A. can you realize B. you can realize
C. realize you can D. can realize you
23. I hate ______ that someone calls when I’m sleeping.
A. / B. one C. this D. it
22. ______ should be responsible for the unexpected result.
A. Who do you think B. Do you think whom
C. Who you think D. Whom do you think
21. Tom, ______ honest man, has made ______ good doctor over these year.
A. a, the B. an, a C. the, a D. an, the
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