—What’s this? —It’s a machine which was invented in __________century in China.
Our Math teacher often gives us __________ on how to learn Math.
---What’s your best friend like? --- .
Eddie is eight years old, but we have seven candles only, we need ________ candle.
Jim is _______11—year—old boy. He is one of my best friends.
Most Chinese children like to sleep with their mother. They are __ the dark.