The first textbooks ______ for teaching English as a foreign language came out in the 16th century.
| A．having written | B．to be written |
| C．being written | D．written |
The question _____ at tomorrow’s meeting is of great importance.
| A．to discuss | B．being discussed | C．to be discussed | D．discussed |
is known to us all, Germany is ______ European country.
| A．It; an | B．As: a | C．It; a | D．As; an |
The club welcome all new members ________ age.
| A．despite | B．regardless of | C．though | D．while |
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