单项选择题
The car accident happened at（）crossroads a few metres away from（）bank.
A.the; / B./; a C./; the D.the; the
单项选择题 The boys enjoyed（）football very much.
单项选择题 The boy is not happy at the new school. He has（）friends there.
单项选择题 The atmosphere（）certain gases mixed together in definite proportions.
