When a pencil is partly in a glass of water, it looks as if ＿＿＿＿. 

 Why were you driving so fast? You   somebody.

 He insisted the person referred ______ put into prison at once.

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

―Is that Miss Liu having dinner over there?―It     be her. She has gone to New York for an important business meeting.