和词汇知识(共15小题；每小题1分，满分15分)
从a、b、c、d四个选项中，选出可以填入空白处的最佳选项。
1．senior 3 high school students should be given enough sleeping time，________ they are busy preparing for the college entrance examinations.
a．even so b．as though c．as if d．even if
答案 d
解析 even if即使，引导让步状语从句。句意为：即使高三学生忙于准备高考，也应该给予充分的睡眠时间。
2．________ english has changed a lot over time and ________ english spoken between about ad 450 and 1150 was quite different.
a．/；the b．/；/ c．the；/ d．the；the
答案 a
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