题目

I’m sure that there _________ a key and two cards on the desk minutes ago, but there’s nothing now.     A. is            B. are           C. was                 D. were 答案：A某人成年后，身高仍不足1m，而且智力低下，由此判断其幼年时期体内很可能缺少（　　）A．胰岛素B．甲状腺激素C．生长激素D．碘