—Where ____ Margaret have put the empty bottles?
—She ______ them away. They must be somewhere.
| A．can; can’t have thrown | B．must; needn’t |
| C．must; must have thrown | D．can; must throw |
If we expect ________ much cleaner world, we should attract ________world’s attention to protect the world.
| A．a; a | B．a; / | C．a; the | D．the; / |
.His plan was such a good one _________ we all agreed to accept it.
| A．so | B．and | C．that | D．as |
.Because of my poor memory, all ____ you told me has been forgotten.
| A．that | B．which | C．what | D．as |
The old house we paid a visit _____ at the top of the hill.
| A．standing | B．to stand |
| C．to standing | D．to stands |
If I’m mistaken, _________ you are mistaken too.
| A．so | B．and | C．or | D．不填 |