After walking in the Shanghai World Expo for a whole day, my legs ____ under me and I couldn’t walk any farther.
| A．gave up | B．gave out |
| C．gave in | D．gave away |
The government is aiming to reduce the unemployment, but it’s quite _______ to have a job at all these days.
| A．anything | B．something | C．somewhere | D．nothing |
Most experts agree that human activities such as the clearing of large areas of forests, and farming on a large scale _________ the problem of global warming.
| A．is leading to | B．is resulting in | C．are contributing to | D．are owing to |
With the help of the collected money, subways can be built sooner and better, _______ brings convenience to citizens.
| A．as | B．what | C．who | D．which |
We spent hours driving and another few hours waiting, only _________ that the plane would be delayed until midnight.
| A．to be told | B．having told | C．to have been told | D．told |
In the experiment we kept _____ watchful eye on ______ developments and recorded every detail.
| A．a; / | B．/; the | C．a; the | D．/;/ |