你开叫1H，你的同伴应叫1S，你认为他是（）
A.消极性应叫
B.积极性应叫
C.阻击性应叫
D.模棱两可性应叫
参考答案：D
正常效应指的是（）
A、暗淡效应
B、闪烁效应
C、瞬间效应
D、缺料效应
______ a little more time to think, he might have acted more sensibly.
A．If he took
B．If he has taken
C．had he taken
D．Should he take
