Question

If you _____ smoke, please go outside because this is a non-smoking office. A．must B．should.

If you _____ smoke, please go outside because this is a non-smoking office. A．must B．should C．can D．may

Answer 1

A

考查情态动词。句意“如果你非要吸烟，请你去外边吸，因为这是无烟办公室。”must可表示“一定，非得，非要”的意思，故选A。