答案：1
解析：解析:
A. these letters mailed
B. mailed letters
C. to mail those letters
D. those letters mail
解析：解析:get=have解析:have sth. done 让别人做某事
A. No matter
B. Whatever
C. However
D. That
解析：解析:make up for 为……补偿
A. the
B. a
C. /
D. that
解析：解析:go to church 去教堂 go to school 去学校 go to bed 上床睡觉 go to college 去大学
A. toward
B. about
C. in
D. over
解析：解析:be anxious about解析:hear from sb.(收到某人来信)
A. that
B. what
C. where
D. which
A. who
B. the man
C. the man who
D. the person which
A. What
B. How
C. That
D. Which
解析：解析:引导主语从句的关联词是that,whether和疑问词。
A. for make
B. to make
C. to making
D. for making
解析：解析:be responsible for
