girls took part in the Super Girl competition, but only few of them succeeded.

On the 40th Earth Day, Dr Wang gave us a talk on the importance of ______ the earth.

The little boy was heard_______ in the street when night fell down yesterday .

Is this book yours ? – No it’s his , is inbag .

Yesterday I lost my pencil sharpener. I couldn’t find_______.—Oh, it’s a pity. You’d better buy ________ this afternoon.