【39】A．forB．inC．afterD．before

【C17】A．untilB．sinceC．afterD．before

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【C5】A．forB．inC．upD．on

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A．forB．inC．of,D．at

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【C11】A．looking forB．looking intoC．looking afterD．looking over

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This area has been free from Foot—and—Mouth Disease （) two years.A．forB．inC．afterD．befor

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【C5】A．forB．withC．afterD．on

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【S6】A．keep upB．reset inC．look afterD．add to

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