题目

John was punished by the teacher because he________tapes________to other students in class when the teacher was asking questions. A．passed；on                  B．passed；over C．passed；away                D．pass；across 答案：A [pass sth on to sb把某物传递给某人，可以省去on。其他短语均不可如此已知代数式的值为-9，那么的值为 [     ]A.-1B.1 C.3 D.-3