A driver should __ the road when .
A concentrate on; drive B. concentrate in; driving
C. concentrate to; drove D. concentrate on; driving
Helen always helps her mother even though going to school ______ most of her day.
A. takes up B. makes up C. saves up D. puts up
Tom is good at his work, but he seems to _____ confidence.
A lack B lack of C lacking in D short of
Peter received a letter just now ________ his grandma would come to see him soon.
A．said B．says C．saying D．to say
The poor man , ________，ran out of the dark cave.
A. tiring and frightened B. tired and frightened
C. tired and frightening D. tiring and frightening
He asked us to him ______ carrying through their plan.
A. assist; to B. assist; by C. assist; of D. assist; in
