根据所给句意和音标,选出一个最佳答案.
You need to keep /′sailənt/when you are in the library.( )
A.sillyB.smileC.smartD.silent
-____you ever ____with a group? -Yes, I have .
---_______ he _______ from Beijing? ---No, he _______.
------ __ does your father go to see your grandmother ? ------Once a month .
study in Lufu Middle School?
I always tell my students _________ on the road because it’s really dangerous.