Mike Smith has been in China for fifteen years. He has made Chinese friends.A. a lot of B

问题补充：

Mike Smith has been in China for fifteen years. He has made Chinese friends.

A. a lot of B. a bit of C. A set of .

答案：

解析：a lot of许多，大量，修饰可数或者不可数名词；a bit of一点，少量；a set of 一套，一副。句意：麦克史密斯已经在中国十五年了。他交了许多中国朋友。结合语境可知选A。