—Whose dictionary is this?
—It ______ be Jack’s. Look, his name is on Page 1.
must
need
can’t
could
If there _____no buying and selling of a nimals, there___ no killing in nature.
--I don’t know if his uncle ________. --- I think he ________ if it doesn’t rain .
It was not very warm ______ the sun came out.
The students hurried to the classroom ________ the bell rang.
She got up early this morning _________ she could catch the first bus.