滑车神经支配的肌肉是
A.上斜肌B.下斜肌C.外直肌D.眼轮匝肌E.瞳孔开大肌
参考答案:A
— There’s somebody at the door. Who ______ it be? Is it the postman ?
—No, it ______ be him. It’s just seven o’clock. It’s too early.
A.may, can’t
B.will, won’t
C.may, mustn’t
D.must, may not