A．whichB．whatC．thisD．that

【C4】A．whichB．whatC．thatD．it

A．whichB．whatC．thatD．those

【38】A．in whichB．whatC．whateverD．that

【C3】A．whichB．whatC．somewhatD．something

A．whichB．whatC．howD．because

【C19】A．whichB．whatC．whereD．that