【C17】A．thisB．whereC．thereD．that

A．thisB．theseC．that

【C17】A．thisB．thatC．itD．so

【C6】A．thisB．itselfC．itD．that

A．thisB．thusC．henceD．that

【C17】A．whenB．whereC．whyD．how

60._________A. whichB. whereC. thatD. there