选择合适的应答语。
（）（1） What is he doing?
（）（2） Is it cold?
（）（3） Are they happy?
（）（4） What are they doing?
（）（5） May I come in ?
| A．Please come in . |
| B．He is flying a kite. |
| C．They are singing . |
| D．Yes , it is . |
E. No , they are not happy.
( )I am going to ____ park.
A. a B. the C. \
( )My mum is ______ to say goodbye.
A. waving B. wave C. waves
( ).It ______ to snow.
A. start B. starting C. starts
（）More _____ come in .
A. friend B. friends C. student