_________ exciting sport it is to go bike riding!
A.What a B. What an C. How
Some children are in the playground．_______ are very happy.
| A．I | B．They | C．He | D．She |
Thank you for _______ the door for me．
| A．open | B．opens | C．to open | D．opening |
We can fly kites on _______ days.
| A．rainy | B．snowy | C．cold | D．windy |
—_______ cap is that?—It’s my cap.
| A．Whose | B．Who’s | C．Who | D．Whose’s |
There _______ a pen and two rubbers in the pencil box．
| A．am | B．is | C．are | D．be |