A．thisB．theseC．that

【C17】A．thisB．whereC．thereD．that

【C13】A．whichB．theseC．thatD．this

【C6】A．thisB．itselfC．itD．that

A．thisB．thusC．henceD．that

【C8】A．whichB．theseC．thatD．those

【C7】A．thoseB．theseC．whichD．whom