问题补充：
How many boys are there in the classroom? ten boys.
A. It is
B. These are
CThere is
D. There are.
答案：
A. It is
B. These are
C. There is
(答案→)D. There are.
解析：句意:教室里有多少个男孩？有十个男孩。根据考查的句型：How many+复数名词+are there +in/on+名词? 答语用There are(not)…表示。故选D.
