问题补充：
While you are reading an article, You’d better the key words and topic sentences.
A. make out
B. mark out
C. carry out
D. hold out
答案：
A. make out
(答案→)B. mark out
C. carry out
D. hold out
解析：动词组考查题。A. make out 弄明白 B. mark out 标出，做记号 C.carry out 执行 D. hold out 坚持。“在读文章是你最好标出重点词语以及话题句”选B
