—Are you sure Mike will help us if we are in trouble?
— _____. He is a reliable friend.
A.It doesn’t matter
B.Don’t take it to heart
C.You can count on it
D.No problem
答案:C
考查交际用语。A. 没关系 B. 别忘心里去
C. 你尽管相信好了 D.没问题
句意:你确信如果我们遇到麻烦麦克 会帮助我们?结合下文他是我最信赖的朋友,可知选C最符合语境。