_____ his accent , he is from the south of China.
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.
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.
The poor man , ________,ran out of the dark cave.