Smile to the world, _____ the world will smile back to you.
| A．nor | B．but | C．or | D．and |
He is busy ,he still does sports every day.
A. Although , /
B. Although , but
C. But, /
-- I have been to Australia. -- So I.
A.am B. did C. have
-- There is some soup on the table,?
A.is it B. isn’t there C.there is
Jenny, put on your coat,you will catch a cold.
A. and B. or C.but
To protect the environment ,we have done to stop all kinds of pollution.
A. useful nothing
B. something useful
C.anything useful