______does she like lions—Because they are very strong.

e another wonderfuldiscovery, ______ of great importance to science

Lisa, what do you think of the job of being a nurse— In my opinion, it ________ be difficult sometimes though it seems easy.

.—-Who are those people gathering infront of the building—–A group __________ itself the youthvolunteers.

____ you change your mind，please let me know.