Later, these rocks proved that ___ in the distant past the Antarctic was covered by plants.
| A．at one time | B．at a time | C．at times | D．at the same time |
With a final conclusion _____, the meeting ended at 4:30 p.m. last Monday.
| A．to draw | B．to be drawn |
| C．drawn | D．drawing |
Take care! Don’t drop the ink on your shirt, for it __ easily.
| A．won’t wash out | B．won’t be washed out |
| C．isn’t washed out | D．isn’t washing out |
Legend has ______ Sun Wu was buried here.
| A．what | B．that | C．it | D．one |
．Not until the third day after the terrible earthquake ______ a phone call from his mother.
| A．he received | B．did he receive |
| C．didn’t he receive | D．had he received |
．Since you are here, you ____ as well stay here for long.
| A．can | B．may | C．must | D．should |