单项选择题
Had you read the report, you ______ how fierce the competition was.
单项选择题 It isn"t cold enough for there ______ a frost tonight, so I can leave my car outside safely.
单项选择题 My mother opened drawer to ______ the knives and spoons.
单项选择题 I ______ my teacher to write a reference letter to me if I see her.
