—When did the terrible earthquake in Lushan happen?—It happened ________ the morning of April 20, 2013.A. in B. at C. on
Lucy is very helpful. She is always _________ others.
Don’t ___________ the birds. Listen to the teacher carefully.
There are_______ seasons in a year. Winter is_________season.
--You are late for class, boy. --Sorry. Inext time.
--There ____ lots of information on sports on ESPN.com.--But most of it is in English.