From the dates__________on the gold coin, we decided that it was made five hundred years ago.
| A．marking | B．marked | C．to be marked | D．having been marked |
She did not take the advice that she ___ at rush hour, so she got lost.
| A．not travel | B．did not go | C．should travel | D．goes shopping |
Jasper is a great painter. He is _____ Picasso.
| A．as a great painter as | B．as great painter as |
| C．as great a painter as | D．so great a painter as |
Men of this kind _______; we’d better ________.
| A．is dangerous; keep away | B．are danger; keep away from him |
| C．are dangerous; keep away from them | D．is in danger; keep away |
--- I was trying to repair that stupid machine, but I failed.
--- Well, you_______.
| A．needn’t do that | B．needn’t have done | C．needn’t have | D．needn’t |
---What are you busy with ?
--- We are carrying out a research _______ the causes of cancer.
| A．into | B．onto | C．to | D．in |