问题
选择题
A: Listen! Is it Linda singing in the next room?
B: No, it __________ be her. She is still in Shanghai.
A．can’t
B．couldn’t
C．may not
D．might not
答案
答案：A
本题考查的是情态动词表示推测，根据后文“She is still in Shanghai.”说明她不可能在家，故选A
C(g)＋D(g)达到平衡后，升高温度容器