---He is an honest person ， so what he said is _______.
A， knowledgeable B， valuable
C， comfortable D， believable
______ it is raining hard ， they are still working in the field.
A. Because B. As soon as
C. Though D. Unless
The houses in big cities are so expensive that I can’t __________ to buy one .
A. afford B. choose C. decide D. Give
.A smile costs _________， but gives so much. So we should learn to smile.
A. something B. anything
. nothing D. Everything
--- Is your teacher friendly ______you? --- Yes， he is very good ______us.
A. to， to B. with ， with C. to， with
---Look， here comes Cindy! She is always full of _____________.
---____________. Because she takes a lot of exercises every day.
A.knowledge， So is she B. courage， So does she
C. change， So she is D. energy， So she is
