单项选择题
Tests provide grades, but they also let you know what you need to spend more time（）and they help make your new knowledge permanent.
A.to study B.study C.studied D.studying
单项选择题 The good service at the hotel（）the poor food to some extent
单项选择题 Even students of average（）can be top students with additional work.
单项选择题 The portraits（） look like them, but I was still unsure of my painting techniques.
