Choose the proper response to the question.(根据问句选择正确的答语)

( )1.What is it?

( )2.Did your teacher give you any advice?

( )3.What advice?

( )4.What do you do with your spelling?

( )5.How about your grammar and vocabulary?

A.Yes,he did.

B.About speaking more English in class or after class.

C.Oh,I always practise doing more reading and more exercises about them.

D.It's my English study plan，I am going to work hard this year.

E.I always check my spelling with a dictionary.

柳氮磺胺吡啶(SASP)治疗溃疡性结肠炎的机制是（）

A.降低肠道酸度，促使溃疡愈合

B.抑制氧自由基形成，能消除炎症

C.促使肠上皮细胞再生

D.抑菌作用

E.肠黏膜保护作用