问题
选择题
Don't worry, sir. I'm sure I can run to catch up with them.
A. slowly enough B enough slowly C. fast enough D. enough fast
答案
C
题目分析：句意： 别担心，先生。我保证我能跑得足够快来赶上他们。由语境可知跑得快，而enough修饰fast须后置，因此选C。
考点: 考查副词的用法。