单项选择题
W: You must have been driving too fast. M: No,I crashed into the tree because I was trying not to hit a box that had fallen off the truck just ahead.
A.He hit a tree. B.He hit a truck. C.He hit a box. D.He hurt his hea
A.A chess set. B.A tennis racket. C.A book on athletics. D.A pen.
A.Boss and secretary. B.Teacher and student. C.Customer and waitress. D.Lawyer and client.