--- Would you mind giving your advice on how to improve our efficiency?
--- If you make most of forty-five minutes classes day after day, there will be switch in grades.
| A．/; / | B．the ; a | C．/; a | D．the; / |
If city noise _______ from increasing, people _______ shout to be heard even at the dinner table 20 years from now.
| A．are not kept; will have to | B．are not kept; have to |
| C．do not kept; will have to | D．do not kept; have to |
The meeting between the presidents of those two countries________in Paris last week.
| A．took apart | B．took action | C．took effect | D．took place |
The famous musician, as well as his students, _______ to perform at the opening ceremony of the 2012 Taipei Flower Expo.
| A．were invited | B．was invited | C．have been invited | D．has been invited |
His best known work that is _____ all praise can be seen in the museum.
| A．with | B．beyond | C．without | D．within |
A recent study has ________an unexpected conclusion that the African elephant should be divided into two different species.
| A．kept up with | B．made up with | C．caught up with | D．come up with |