Up to now, Hope Project has helped thousands of students who would       have dropped out of school.

—I heard Charlotte had been drowned in the lake.—Really！Her boat turned______,and ______she couldn’t swim.

Jack had to call a taxi because the box was _______ heavy to carry all the way home.

 A Korean survey shows that shopping cart handles are the most bacteria-carrying items among some ________used objects.

The test not only helps make our _____ acquired knowledge permanent, but also enables us to find out what needs to take more time to improve.