—It's _____ unhealthy habit. You must ask him to change it.
A：a
B：an
C：/
“中国人口约为 4亿5千万，列强要求中国赔款4亿5千万两白银，用意是每个中国人都要向他们交纳 1 两白银的‘罚金’，借此惩罚、侮辱所有的中国人。 ”该材料反映的不平等条约是（ ）
—I didn't push her ; it was an accident.
—You'd better ______ first. I'm afraid the size is a bit small for you.
