5.My new glasses cost me ____ the last pair that I bought.

5.My new glasses cost me ____ the last pair that I bought.
　　A.three times as much as
　　B.three times as much
　　C.three times much as
　　D.three times
6.“Is Mary coming to the concert?” “I think ___.”
　　A.yes
　　B.it
　　C.that
　　D.so
7.We can see a lot of people doing morning exercises in the parks even ___ a cold morning.
　　A.on
　　B.at
　　C.in
　　D.during
8."George studied hard." "________"
　　A.so did I
　　B.so I did
　　C.so do I
　　D.so I do
9.It was in this house ______ the important meeting in history was held
　　A.where
　　B.that
　　C.which
　　D.in which
10.The reason____ we should study foreign language is very clear.
　　A.when
　　B.which
　　C.who
　　D.why