China's present environment situation is from bad to worse and if we _________ now to protect the environment, we’ll live to regret it.
| A．hadn’t acted | B．haven’t acted | C．don’t act | D．won’t act |
Which is＿＿＿＿＿country, Canada or Australia?
| A．a large | B．larger | C．a larger | D．the larger |
Alexander Graham Bell invented＿＿＿＿＿telephone in1876．
| A．／ | B．a | C．the | D．one |
Beyond＿＿＿＿＿stars, the astronaut saw nothing but＿＿＿＿＿space．
| A．the；／ | B．／； the | C．／；／ | D．the； the |
Alice is fond of playing＿＿＿piano while Henry is interested in listening to＿＿＿music．
| A．／； the | B．／；／ | C．the；／ | D．the； the |
＿＿＿＿＿danger man is often much wiser than usual．
| A．In a time of | B．In the times of | C．In the time of | D．In time of |