--- Whose book is this ?---It _____ Tom’s . There is his name on it .A. can’t be B. must be C. can be
Wolves often work __________a team and they never kill for __________.
We should tell hunters _______tigers.
Yesterday I talked to Amy on the phone and she ______ happy.
Can you tell us how important wildlife ___ is?
There are ________ bears on the earth because they have ____________ space on it.