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
His report was so exciting that it was interrupted by applause（掌声）.
A. constantly B. constant C. seldom D. never
I sight of an empty seat at the back of the bus and went directly there.
A. lost B caught C. looked D. took
