170. So long as you work hard enough, a(an) _____ rod can be ground into a needle. (prov.)
| A．steel | B．stick | C．gold | D．Iron |
—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 |
______ she has earned her PhD, she wants to find a job with higher pay.
| A．As if | B．Now that |
| C．Even though | D．In case |
Prince William took a visit to the Forbidden City on Feb. 28, ______ emperors once lived.
| A．which | B．whose | C．where | D．when |