Opinions of that kind are best kept to yourself, and not voice＿＿＿＿＿．
| A．by public | B．in public | C．in a public | D．in the public |
Mary decided not to work on the program at home because she didn’t want her parents to know what she __________.
| A．has done | B．had done | C．was doing | D．is doing |
It’s very surprising that Lucy _____ German so quickly—she hasn’t lived there very long.
| A．picked up | B．looked up | C．put up | D．made up |
The internet has made ____ possible for everyone to talk with friends miles away.
| A．that | B．this | C．one | D．it |
My mind wasn't on what he was saying so I'm afraid I ______ half of it.
| A．was missing | B．had missed | C．will miss | D．missed |
--- Can you believe I had to pay 50 yuan for a haircut?
-----You should try the barber’sI go. It’s only 10.
| A．as | B．which | C．where | D．that |