He swallowed his words so much that I can never what he is saying.
A. make out
B. catch up
C. deal with
D. listen to
网友回答
A. make out
B. catch up
C. deal with
(答案→)D. listen to
解析：考查短语辨析。make out分辨出，catch up 赶上，deal with 处理，listen to 听，句意：他的话省去了好多以至于我根本不能听出他在说什么。所以选D。