当我必须短期离家出门的时候，我会感到心神不安。
A．是
B．否
参考答案：B
—Well, that was really a good meal. I _______ you were a really good cook.
—Thank you.
A．didn’t know
B．don’t know
C．haven’t know
D．hadn’t known
冷风漏入制粉系统，不仅会增加（），而且还会（）
