1.Either of the plans ____ equally dangerous. A. are    B. is  C. has   D. have

2.The police ____ the murderer everywhere when he suddenly appeared in a theatre. A. is searching          B. were searching for   C. are searching         D. was searching for   3.Your trousers ____ dirty, you must have ____ washed. A. is it     B. are it     C. are them    D. is them   4.The Olympic games ____ held every four ____. A. is years    B. are years    C. is year     D. are year   5.He is the oly one of the students who ____ elected. A. are     B. have     C. has      D. is   6.____a good enough price for this book. A. Two yuans are  B. Two yuan are    C. Two yuans is     D. Two yuan is   7.No bird and no beast ____ in the lonely island A. are seen     B. is seen     C. see       D. sees   8.Every means ____ prevent the water from ____. A. are used to polluting       B. get used to polluting C. is used to , polluted      D. is used to ,being polluted   9.Each of the ____ in the ship. A. passenger has his own room     B. passengers have their own room C. passenger have their own room   D. sengers has his own room   10.What we need ____ good textbooks. A. is       B. are     
C. have     D. has

【答案解析】  1-5 BBCBD      6-10 DBDDB

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