1. Japan's refusal to release(释放)Chinese fishing boat captain had "already causedserious damage to Sino-Japanese bilateral contacts(双边关系)".
A.a; 不填 B. a; a C.the; 不填 D. the; the
2. Food safety isimportant, so preventing food pollution is of great.
A.considerably, necessary B.reasonably, necessary
C.considerably, necessity D.naturally, necessity
3. When human beings are facing the invasion of the superbugs(超级细菌), new antibiotics(抗生素)save people from the superbugs will be the main focus of the world.
A.made to B.supposed to C.designed to D.hoped to
4. The fantastic mud-rock flow in Zhouqu of Gansu at about 22 o’clock on August 7 , 2010 was considereddeaths of more than 1,000 natives .
A.to cause B.causing C.to be causing D.to have caused
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