1 Sorry,i can't catch your meaning "catch"可以替换成（ ）

1 Sorry,i can't catch your meaning "catch"可以替换成（ ）
A listen B understand C follow D read
答案是C
为什么不是B啊?
如果用B,那么后面应该接的宾语是you,翻译成汉语是"明白你"
2 Lily teaches herself English “teaches herself”可以替换成（ ）
A studies...herself
B learns...by herself
C learns herself
D understand...by herself
答案是A
为什么不是B啊?
这是固定用法teach oneself...=learn...by oneself.翻译成汉语是"自学..."
3 it's good for you to take exercise in the morning “take exercise”可以替换成（ ）
A do some exercise B do exercise
C do sports D take sports
答案是C
为什么不是B呢?
这是固定用法"做运动",可以有do sports或者take exercise,其中动词不能换,名词的单复数不能弄错了.
从你的问题可以看出,你是一个爱问问题的学生,这很好,它是你进步的前提.希望你能有疑必问,而且还要多记短语搭配.