It's best to stay indoors，________when PM2.5 has reached dangerous levels．（ ）
A．exactlyB．possiblyC．especiallyD．generally
找出与划线部分发音一样的单词stoma ch（ ）
| A． |
chair |
B． |
chemical |
C． |
coach |
D． |
sandwich |
找出与划线部分发音一样的单词s outh（ ）
| A． |
round |
B． |
southern |
C． |
group |
D． |
enough |
找出与划线部分发音一样的单词br ead（ ）
| A． |
break |
B． |
idea |
C． |
weather |
D． |
great |
找出与划线部分发音一样的单词w arm（ ）
| A． |
farther |
B． |
party |
C． |
dollar |
D． |
quarter |
找出与划线部分发音一样的单词f ine（ ）
| A． |
police |
B． |
blind |
C． |
kilo |
D． |
cinema |