I find __________ very difficult to learn English well .

—Is your ipad white, Mandy? —No, it isn’t. _______ is black.

It’s very important for us to learn how to learn by        .

—Who will send you to school, your mom or your dad?—        .I’ll go there alone.

－Is that your bike, in front of the black one?        －No. It’s ______.