----- Oh, my goodness! My laptop must have got stolen． ----- But where _____ a thief have entered the house with all the doors and windows still locked?

I didn’t know that he was a cheat, or else I ________________ him.

一What does the sign over there read?一“No person ______ smoke or carry a lighted cigarette, cigar or pipe in this area.”

— He hasn’t finished the work yet.— Well, he _____.

Although you ______ find bargains in London, it，s not generally a cheap place to shop.