I feel it hard to keep up with my classmates. But whenever I want to ， my teacher always encourages me to work harder.

I don’tknow ______ with this problem. It’s too hard. — You can ask Mr Wang for help.

o, this is 8325788— ____

Let’s keep to the point, or we______ any decisions

Do you know Mary—Yes, Mary is ______ girl, but she knows a lot about science.