–I called you yesterday afternoon, but you were not at home.
--Sorry, I _________ some shopping with my mother then .
| A．is doing | B．do | C．was doing | D．will do |
The mobile phone has influenced people’s life a lot since it _______.
| A．invents | B．invented |
| C．is invented | D．was invented |
. –Mary, is this ______ umbrella?
--No, it’s not mine. It is _______.
| A．you; hers | B．your; hers |
| C．yours ; her | D．your; her |
The tall building has ______ floors. And Tony lives on the ______ floor.
| A．twelve; twelve | B．twelfth; twelfth |
| C．twelfth; twelve | D．twelve; twelfth |
________ clever girl she is! She got a good mark in the math exam again.
A. What B. What a C. How