After graduation, he _____ the challenge, which _____ all his spare time.
| A．took up; took up | B．took on; took on | C．took in; took over | D．took on; took in |
We should do all we can the children who lost the chance to go to school.
| A．help | B．to help | C．helping | D．to be helping |
---- You can take a walk daily if you want to keep healthy.
---- .
| A．Yes, that’s enough | B．Thanks for your advice |
| C．I like surfing the Internet | D．Well, that’s OK |
our earth, or else it will be no longer fit for us to live on.
| A．Protect | B．To protect | C．Protecting | D．Protected |
Professor Williams keeps telling his students that the future to the well- educated.
| A．belongs | B．is belonged | C．is belonging | D．will be belonged |
Trees on the hills can stop the rains from away the soil.
| A．to wash | B．washed | C．washing | D．washes |