— Mr. Smith joined in different activities in Beijing. Do you know ___________?— Since 5 years ago.
The sentence structure of “They painted the walls white” is _____________.
The camera is too expensive ________.
-----Look at the sign. It _________ “No smoking”. ----Oh, sorry, I did not see it.
Although you have lots of difficulties, you mustyour work.
If you want to be , you’d better take.