【C5】A．howB．whereC．whyD．which

___________ 查看材料A.howB.whenC.whyD.whether

【C15】A．howB．whatC．whyD．which

【C2】A．whatB．whereC．whyD．how

【C9】A．whenB．whereC．whyD．how

【C5】A．whichB．whereC．whenD．whether

【C17】A．whenB．whereC．whyD．how