变异性心绞痛首选（）。

A.美托洛尔

B.心痛定

C.消心痛

D.硝酸甘油

E.阿替洛尔

根据句意及首字母补全在本课中出现的单词。

   1.Students like to wear j_______ this year.

    2.We don't go to school on w_______.

    3.The ball is r_____.

    4.This sweater is made of c______.

    5.The girl always keeps her room t______ and clean.

    6.There are twelve months in a y_________.