If we don’t take some measures to protect this kind of plant, it will ____ soon.
| A．die out | B．die down | C．die from | D．die of |
What a pity! I missed meeting my boss at the airport because my car was ___in the traffic jam．
| A．broken up | B．kept away | C．held up | D．kept up |
The medicine works more effectively ______ you drink some hot water after taking it.
| A．as | B．until | C．although | D．if |
I don’t understand what the engineer means, but I’ve got ____rough idea of ___ project plan.
| A．the; a | B．不填; the | C．the; 不填 | D．a; the |
Could it be in the room _________ we had a talk last night ___________ you left your keys ?
| A．that; where | B．in which; where | C．where ; that | D．where ; where  |
Those books were _______ adults, so it’s unnecessary for teenagers to digest them carefully.
| A．devoted to | B．intended for | C．connected with | D．introduced to |