The students are doing some cleaning. Some are sweeping the floor, ________ are cleaning the desks and chairs.
—Have you seenbook on the desk? —Is itEnglish book? I saw it just now.
There is _____ interesting on this channel. Please try a different one.
Is it important ________us __________ learn English well?
I don’t know when Kitty ___________ tomorrow, and please give this message to her when she _________________.
I can’t decide _____.