单项选择题
He is（） at doing this kind of job.
A.imefficient B.nonefficient C.unefficient D.inefficient
单项选择题 Cycling is a good exercise.（）, it doesn't pollute the air.
单项选择题 Speed limits should lead（） fewer deaths on the roads.
单项选择题 The hospital is carrying（）tests to find out what’s wrong with her.
