What did you do yesterday afternoon-I went to the bookstore，___ some books and visited myuncle
Would you like _____
The classroom is not________ clean ______it was yesterday .—Sorry, I forgot to clean it.
From time to time a crocodile has snatched someone _______ he or she is even aware that the crocodile is there
It is demanded that the plan _____ out as soon as possible.
