A left-luggage office is a place where bags ________ be left for a short time, especially at a railway station.

[　　]

－The room is so dirty. ________ we clean it?

－Of course.

[　　]

My English-Chinese dictionary has disappeared. Who ________ have taken it?

[　　]

It has been announced that candidates ________ remain in their seats until all the papers has been collected.

[　　]

You can't imagine that a well-behaved gentleman ________ be so rude to a lady.

[　　]

－Could I call you by your first name?

－Yes, you ________.

[　　]

When he was there, he ________ go to that coffee shop at the corner after work every day.

[　　]

Sir, you ________ be sitting in this waiting room. It is for women and children only.

[　　]

________ it rain tomorrow, we would have to put off the visit to the Yangpu Bridge.

[　　]

Michael ________ be a policeman, for he's much too short.

[　　]