• [A] pencil
• [B] knife
• [C] book
• [D] umbrella
• [E] paper
• [F] key
• [G] eraser

People use it to write things on.

A．Summer is a good season.
B．There are many birds in summer.
C．The nightingale not only sings at night but also sings at day.

A．hundred
B．hundreds
C．thousand