用is, am 或are 填空
（1）Excuse me. What _______ this in English?
（2）________ the your coat, Mr Green? No, it _________ not.
（3）What ________ these? ___________ they maps?
（4）This __________ your bike. Where __________ my bike?
（5）__________ in Class Eleven. What class ___________ you in?