There are still many problems ______ before we are ready for a long stay on the Moon.
| A．solving |
| B．solved |
| C．being solved |
| D．to be solved |
Roses need special care _____ they can live through winter.
| A．because | B．so that |
| C．even if | D．as |
We all think highly of the important part Wang Zhizhi ___________ in this match.
| A．played | B．did |
| C．had | D．took |
I don’t like the way ______ you speak to her.
| A．of which | B．in that | C．/ | D．which |
—What has Tom been doing recently?
—I don’t know, ________ care.
| A．nor do I | B．nor I do | C．neither am I | D．neither I am |
She pretended _______ me when I passed by.
| A．having not seen | B．not seeing |
| C．to not see | D．not to see |