Though he’s only 8 years old, he can read _______ on science.

 There are two new buildings near the sea, and ____of them are very tall.

The boy used to cause a lot of _________/’tr?bl / very much.

—        have you been married? —For twenty years.

—There are so many flowers on ___________ side of the street．—Yes．I hope that all the flowers belong to _______________．