—I visited France last year. —That         interesting.

The problem is too difficult for him. He _______ solve it by himself without any help.

The magazine        be Lily’s, for we can find her name on the cover.

---Where is Tom?        ---He hasn’t come to school today. I think he        be ill.

.--- Excuse me. Is this the right way to the Summer Palace? --- Sorry, I am not sure, but it _____ be .