The chairman asked me to _________ my speech to 20 minutes.
| A．make | B．give | C．explain | D．limit |
So difficult ________ it to live in an English-speaking country that I was determined to learn English well．
| A．I have felt | B．have I felt | C．I did feel | D．did I feel |
Only those who follow their dreams ____ achieve the final success．
| A．do they | B．can they | C．they can | D．can |
We’d better take umbrellas—I’m sure it _____ when we arrive in London; it’s always wet there at this time of year．
| A．will rain | B．is raining | C．will be raining | D．would rain |
I ____ to go for a walk, but someone called and I couldn’t get away．
| A．was planning | B．planned | C．had planned | D．would plan |
___ help the people in the snowstorm in the south made him worried．
| A．Not known how to | B．Unknown what to do to |
| C．His knowing not how to | D．His not knowing how to |