【C17】A．untilB．sinceC．afterD．before

It was not long _______ I forgot it all.A、thenB、whenC、afterD、before

【C5】A．untilB．onceC．afterD．since

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

【39】A．forB．inC．afterD．before

Hardly had we got on the bus______it began to rain.A．whenB．sinceC．butD．before

A. until afterB. ever sinceC. so thatD. long before