题号:16 题型:单选题（请在以下几个选项中选择唯一正确答案） 本题分数:6.25
内容:
We have kept ___ our friendship by writing to each other, so we are true friends.
选项:
a、up
b、back
c、off
d、down


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题号:17 题型:单选题（请在以下几个选项中选择唯一正确答案） 本题分数:3.12
内容:
The boss ___ the young man that he would receive a raise.
选项:
a、secured
b、insured
c、ensured
d、assured


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题号:18 题型:单选题（请在以下几个选项中选择唯一正确答案） 本题分数:6.25
内容:
Three people, ___ a child, were injured in the accident.
选项:
a、included
b、include
c、including
d、includes


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题号:19 题型:单选题（请在以下几个选项中选择唯一正确答案） 本题分数:6.25
内容:
He gave to his friends what he ___ to his family.
选项:
a、declined
b、refused
c、rejected
d、denied


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题号:20 题型:单选题（请在以下几个选项中选择唯一正确答案） 本题分数:6.25
内容:
No one can possibly racall any detail about the meeting. It is at least five years since it ___.
选项:
a、had taken place
b、was taken place
c、took place
d、was taking place

16 A (keep up 保持）
17 D (assure 向...保证）
18 C
19
20 C