第1题
Code-switching refers to the fact that a speaker changes from one language to the other in different situations or when talking about different topics. ()
第2题
第3题
第4题
When you take a bus alone, it's safe for you ______.
A.to sit behind the driver or with other people, but not to sleep
B.to talk with the driver
C.to call your friends
第5题
第6题
第7题
When introducing yourself, try to speak in a humble way.
A.Y
B.N
C.NG
第8题
第10题
第11题
A. small
B. large
C. middle
D. little
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