.They were all so tired that they could ______.
| A．do nothing but sleep | B．do anything but sleep |
| C．do nothing but to sleep | D．do anything but to sleep |
—What else would you like？
—________else．I’ve had enough．Thank you．
| A．Something |
| B．Nothing |
| C．Anything |
| D．Everything |
—Have you finished your homework？
—________．Just half of it．How about you？
| A．Not at all |
| B．Not likely |
| C．Not a bit |
| D．Not yet |
The first student________to school is Li Lin．
| A．to get |
| B．gets |
| C．to getting |
| D．getting |
Qomolangma is very dangerous________．
| A．climbing |
| B．to climbing |
| C．climb |
| D．to climb |
The main reason is________endangered animals．
| A．to protect |
| B．protect |
| C．to protecting |
| D．protects |