It rained heavily, so we _______ stay at home watching TV or surfing the Internet all day.
A. could B. had to C. must
Scientists are trying their best to_______ ways to treat the terrible disease caused by Ebola(埃博拉）．
| A．come up with | B．look forward to |
| C．talk about | D．give up |
—The air pollution is terrible.
— It will be worse ________ we take action to protect the environment.
| A．if | B．unless | C．until | D．When |
— What do you think of our performance on the New Year’s Evening party?
— Perfect! I don’t think I can see a ________ one.
| A．worse | B．good | C．better | D．bad |
The Asian Cup is coming! All the matches are worth ________.
| A．watch | B．watching |
| C．to watch | D．Watched |
—- MH Flight 370 has been lost for nearly three months.
— What a pity! I wonder___________________.
| A．that there will be the latest news about it. |
| B．where is it now |
| C．where can we find it |
| D．what has happened to it |