【C17】A．whenB．thatC．howD．what

【C19】A．whenB．whereC．howD．if

【C5】A．whenB．whichC．howD．it

【C11】A．whenB．thatC．ifD．" />

【36】A．whetherB．thatC．howD．because

【C7】A．whenB．whereC．howD．what

【C6】A．whatB．thatC．howD．why