many，minutes，hour，there，how，are，in，an
____________________________________________
There are _____ students in our class.That is 19 boys and 21 girls。
Thisbookisthelightestand______(thin)ofallthebooks.
One day, Mr Green asked Mrs Green ______ (go) shopping for him.
I can see ______ in Lucy's room.
()It's nine o'clock. I must ______.
