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

______ in his studies, he didn’t know that all the others had left.

Is this ruler?－No, it isn’t. It’s .

You’d better ____________ late next time.

After winning the badminton championship at Wuhan Sports Center in May, the Chinese players’ faces ____ with joy.