一、单项选择 从下列每题所给的选项中,选择一个最佳答案。(15分)
1.He studies in _____ university . ____ university is famous in the world.
A.an , An B.an ,A C.a , The D.a , A
2.Some unhealthy computer games have a bad effect _________ teenagers .
A.to B.for C.on D.with
3.—Whose diamond necklace is this ? —It belongs to ________.
A.he B.his C.him D.hers
4.There are too many kangaroos in Australia. To keep the balance of nature, the government has made a _______to hunt some of them.
A.noise B.decision C.mess D.mistake