. It used to be thought _____ the Earth was flat.
| A．as | B．when | C．since | D．that |
The doctor had almost lost hope at one point, but the patient finally__________ .
| A．pulled out | B．pulled through | C．pulled up | D．pulled over |
After ________________ a sandstorm warning on Sunday evening, meteorologists forecast that dusty weather will continue in parts of the country on Monday.
| A．breaking off | B．calling off | C．leaving off | D．putting off |
Having lived in China for 8 years, Helen has a good ______ of both English and Chinese．
| A．program | B．guidance | C．command | D．ability |
—How about seeing the new comedy tonight?
— I don’t like drama．
| A．It's not my cup of tea． | B．How come? |
| C．I'm right with you on that． | D．That's a deal． |
These animals are all used to their environment,______, they have learned how to live successfully in their habitat．
| A．however | B．for instance | C．what’s more | D．or rather |