1. He came to China _______ 1998.A. fromB. sinceC. atD. in2. — ____ did you buy the new bag?—Last Monday.A. Where
B. HowC. When D. Who3. Mr. Yang is too ______ to go on walking.A. strongB. tall C. kind
D. tired4. ______ trees are cut down every year.A. Thousand
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