It has been announced that all the students ______ put on the masks before going to school in case they are infected with SARS virus.
There were many students and teachers at the party yesterday. I looked for two seats to sit down with my friend, Tim, but there were ____.
The teacher came to the classroom and demanded ____ what had happened.
A love marriage, however, does not necessarily ____ much sharing of interests and responsibilities.
Doing your homework is a sure way to improve yor test scores, and this is especially true ____ it comes to classroom tests.
I haven' t seen Mary these past few days. I m afraid she ____ herself for some time.