There is a pen ______some pencils on the desk.
Little Henry _______ the model plane for three years and he really loves it.
---These problems are too hard to ______. Could you give me some advice?--- There are many ways. The most important is to have a careful plan.
Just now my teacher told me, “______ be late again, or I’ll be angry.”
Children _____ sit in the front seat of the car. It’s too dangerous.
As teenagers, it’s very important to know how to ask for information _______.