They______ when the teacher came in.
| A．talk | B．are talking | C．to talk | D．were talking |
— What can I do to save energy?
— You ought to the electricity when you leave a room.
A. shut off B. give up C. take away
Mr. Brown to Taiwan for his business the day after tomorrow.
A. flies B. is flying C. flying
There is no that the Internet plays an important role in the modern life.
A. question B. doubt C. problem
More and more trees were cut down., many animals are dying out.
A. So that B. As a result C. In order to
The flight MH370 disappears now. We don’t know the missing plane.
A. what to find
B. which to find
C. where to find