Exercise such as playing basketball is fun.
Keep quiet, please! You must know talking loudly________ in the reading room.
These new types of energy from the sun, wind and water cost very little and will never ________.
— May Day is coming up. Have you decided ________?— I’m planning to go on a trip to Hangzhou.
It’s much easier for us to become friends________ we share similar interests.
— What do you think of the TV show “I’m a Singer” last Friday?— Wonderful! I don’t think I can see a ________ one.