We are wondering ________ we can prevent people from polluting the earth.
| A．who | B．that | C．whether | D．what |
The third month of the year is______.
A. May B. July C. March
Where ______ she ______ from?
A. does, come B. is, comeC. does, comes
His mother is ______. Today is his mother’s thirtiethbirthday.
A. thirteen B. thirtyC. Thirtieth
—Let’s meet on Sunday. ______ ?—I want to meet you, but I am really busy.
A. Is that right B. Is it right C. Is that OK with you
We sell all our clothes ______ very good prices.
A. at B. inC. On