题干
---________ can you finish this English examination?
---In about one and a half hours.
A：How far
B：How often
C：How soon
D：How long
答案(点此获取答案解析）
C
---________ can you finish this English examination?
---In about one and a half hours.
A：How far
B：How often
C：How soon
D：How long
）是一种重要的有机合成中间体，实验室可用苯和1，2一二氯乙烷（ClCH2CH2Cl）为原料，在无水AlCl3催化下加热制得。
