—Will you give me a hand? I have some trouble_______ the scientific problem.—Don't worry. I'll try my best to help you _______.
—I want to know if Maria ______ us in the fashion show tonight. —I believe if she ______ her homework, she will join us.
(原创)There are a lot of on the hill, are eating grass now.
Every day, too much water _______ in our school. We should save it.
—Look, _______ is dancing under the tree. —Oh, that’s my cousin, Anna.
May we leave the classroom now? No, you _____. You_____ to leave until the bell rings.