单项选择:
Bob bought ______ books, but he only read _______.
A. a few of; a lot
B. lots of; many
C. a lot; a few
D. a lot of; a few
He looks ____. What ______ him?
A. worriedly; worry
B. worry; worries
C. worried; is worrying
D. worrying; worries
句型转换:
His father is not healthy. Every day he takes some exercises to keep fit.
His father takes exercises every day because he is in ______ ___________. 
