【C5】A．howB．whichC．thatD．what

【C6】A．whereB．whichC．thatD．as

A．whatB．whichC．thatD．since

【29】A．whatB．whichC．thatD．if

He seems not to have grasped what I meant, ______ greatly upsets me.A．itB．whichC．thatD．wha

【C6】A．thoseB．whichC．thatD．what

【C5】A．whyB．whichC．becauseD．what