按要求完成下列各题。
（1）leaf(复数 )
（2）babies(单数)
（3）watch(第三人称单数)
（4）two (序数词)
（5）twelfth(基数词)
（6）can’t(完全形式)
—________ you playing football?
—Yes, we ________ .
A．Are；areB．Do；doC．Is；is
—What is Miss White doing?
—______________
A．He is reading a book. B．She is writing a letter. C．I am singing.
—Is your ________ running now?
—Yes, he is.
A．brother B．sister C．mother
— ________ are they doing?
—They are playing computer games.
A．Who B．what C．What
What is the emergency number in Canada?
A．911 B．999 C．000