问题补充：
The teacher spoke so fast that it was hard for the students to what he was saying.
A. take in
B. take off
C. take on
D. take after
答案：
(答案→)A. take in
B. take off
C. take on
D. take after
解析：动词词组辨析。 A. take in 理解 B. take off脱掉 C. take on 呈现 D. take after 像…老师说得如此快以至于对学生来说理解老师的话是非常难的。选A
