【39】A．forB．inC．afterD．before

【C17】A．untilB．sinceC．afterD．before

【C5】A．forB．inC．upD．on

A．forB．inC．of,D．at

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

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

【C5】A．forB．withC．afterD．on