Which is ________ , the sun or the earth?
My father will be back ______ the morning of May 15.
I don’t know if Mr Wang ________here tomorrow . If he ______ , please tell me.
----What did your uncle say? ----He told me he _____ call me the next day.
-----Who helped ________with the job ?-----Nobody , They did it by______.
---What he enjoys _____ great and interesting.---Yes, but it’s dangerous.