____ a computer works is a question ___ not everyone cad answer quickly.
| A．That；which | B．How；that | C．What；which | D．When；that |
That restaurant is extremely popular, ______ you may have to wait to get a seat.
| A．for | B．so | C．or | D．yet |
Premier Li Keqiang delivered a speech at the conference, _________ university graduates to start their own business.
| A．encouraging |
| B．to encourage |
| C．having encouraged |
| D．encouraged |
—What do you think of the Huawei P7?
—Terrific, I would buy one if I ______ an iPhone 6 Plus last year.
| A．didn’t buy |
| B．don’t buy |
| C．hadn’t bought |
| D．haven’t bought |
______ worries me that my daughter plays with her cellphone for a long time every day.
| A．It | B．What | C．This | D．That |
—Has James arrived at the hotel?
—No, he ______ by fans for photographs at the airport.
| A．has surrounded |
| B．would surround |
| C．was surrounded |
| D．is being surrounded |