There ____ lots of bad information that is not suitable for teenagers on the Internet.

Did you notice John was not at work today?—No.If _______ working,I would have noticed it.

If you want t get more information about English learning, please visit our _______.

We didn’t begin our group discussion ______ every member came.

“ Blood Moon” appeared in the sky between 6:24 pm and 7:24 pm on October 7,2014, which is quite unique for moon.