Listening attentively in class and reviewing in time _______ a sure way to improve your learning, and this is especially true _______ it comes to standard tests.
| A．is, when | B．are, when | C．is, while | D．are, as |
For many years, people electric cars. However, making them has been more difficult than predicted.
| A．had dreamed of | B．have dreamed of | C．dreamed of | D．dream of |
—Would she mind playing against her former teammates?
—She is willing to play against any tough players.
A．I think so. |
B．I’m  not surprised. |
C．Of course. | D．Not likely! |
It is uncertain side effect the medicine will bring about, although about two thousand patients have taken it.
| A．that | B．what | C．how | D．whether |
The experiment shows that proper amounts of exercise, if regularly, can improve our health.
| A．being carried out | B．carrying out | C．carried out | D．to carry out |
I guess we’ve already talked about this before but I’ll ask you again just .
| A．by nature | B．in return | C．in case | D．by chance |