29．It is required in a recent study suggesting the importance of teenagers’ communication with other children of the same age.
| A．interfere | B．interferes | C．can interfere | D．is to interfere |
—Lucy, tell me about your trip to the beach.
—Awful! There ________ too many holidaymakers.
| A．had been | B．were |
| C．would be | D．have been |
—Sorry, sir. And you'll let me pay to have your jacket cleaned, won't you?
—That's all right. Coffee ________ lasting marks on clothing, I'm sure.
| A．didn't leave | B．doesn't leave |
| C．hasn't left | D．hadn't left |
—How long on earth shall I have to wait?
—Sorry, sir. Just a minute. There ________ a table available.
| A．is | B．was |
| C．will be | D．has been |
When I ________ home, I caught a thief stealing from a passerby.
| A．headed | B．was heading |
| C．has headed | D．had headed |
Up to now, thousands of red phone boxes, the old image of Britain, ________ due to mobile phones.
| A．removed | B．have removed |
| C．were removed | D．have been removed |