Jack is good at drawing. I think no one draws __--
The police ____ still not sure ______ the young man killed himself or was killed.
You had better ________some food and drinks before the field trip ________.
—How many students do you think are still on the playground now?—I am afraid there are few of them, ______?
At the science museum,the students from Sunshine Middle School get to know__________.
Sandy said that she _______ a cold for a week.