问题补充:
It’s really difficult to what he is trying to express.
A. leave out
B. pick out
C. work out
D. make out
答案:
A. leave out
B. pick out
C. work out
(答案→)D. make out
解析:A. leave out遗漏,B. pick out 挑选出,辨认,C. work out制定出,锻炼,D. make out辨认,理解,句意:真的很难理解他想表达什么。所以选D。