Scientists think they have _____ in their attempt to find the causes of some major dieases.
| A．broken through | B．worked out |
| C．fallen out | D．got round |
The recent study has shown that people’s attitudes towards protecting the environment aren’t _________with their behavior in daily life.
| A．reliable | B．consistent |
| C．positive | D．cautious |
After a short break, the teacherthe lesson where she had left off just now.
| A．swept up | B．speeded up |
| C．broke up | D．took up |
Now, a Chinese couple, whether the husband or the wife is a single child, can have a second child. This used to only _______ couples who were both single children.
| A．attend to | B．apply to |
| C．appeal to | D．add to |
We should learn from various civilizations, ancient and modern, andbenefits from them.
| A．conclude | B．suspect |
| C．absorb | D．announce |
The well-known actress last night put on a white tight skirt on purpose to _______ that she was not pregnant(怀孕的).
| A．classify | B．satisfy |
| C．simplify | D．clarify |