My book, The House of Hales, is missing. Who ________ have taken it?

— I’m a little tired. Let’s go to the zoo by taxi.  —We ________take a taxi. It’s not far from here.

— You  went to town last month, What  do you think of it?— Terrible . I _____ go there _____.

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

She ______ have attended that meeting, for she was doing paperwork in the office then.