Columbus was considered___the great land of America
| A．to discover |
| B．to have discover |
| C．discovering |
| D．having discovered |
The nutrients in ________ falls into the ocean quickly become available to other living things.
| A．what | B．that | C．whatever | D．which |
AIDs is a disease that _______ the body”s immune system.
A breaks out B. breaks into C. breaks down D. breaks up
Word came ________ the present would be shown around Zunyi.
| A．that | B．what | C．whether | D．if |
______ quickly, _______ you won’t be able to catch the train.
| A．To get up; or | B．Getting up; and |
| C．Get up; or | D．If getting up; but |
Mr. Green didn’t understand ________ made his daughter so absent-minded this morning.
| A．how that was | B．what was it |
| C．why it was that | D．what it was that |