. They did everything they could to prevent the pollution ______ the river.
| A．protecting | B．to protect | C．from being protected | D．from protecting |
—I find it very difficult to read ________ novel you lent me last week.
—Yes.It's necessary to have ________ good knowledge of history.
| A．the；/ | B．a；/ | C．the；a | D．a；a |
—What do you think of the manager of your company?
—Oh，he is ________ manager who's pleasant to work with.It's ________ pleasure to work with him.
| A．the；a | B．a；a | C．a；the | D．/；a |
—Can I help you with it?
—I appreciate your ________，but I can manage it myself.
| A．advice | B．question | C．offer | D．idea |
You'd better write down the phone number of that restaurant for future ________.
| A．purpose | B．reference | C．progress | D．memory |
Teachers have to constantly update their knowledge in order to maintain their professional ________.
(2011·江苏，27)
| A．consequence | B．independence |
| C．competence | D．intelligence |