Below ____ an article about advertisements ____ by a student for her English project.

A．are; writing

B．be; to be written

C．being; written

D．is; written

关于智力量表的评估划界分，错误的是（）

A.84～70是边界智力

B.69～50是轻度低下

C.49～35是中度低下

D.34～20是重度低下

E.15以下是极重度低下