The boy was so careless that the glass fell from his hand and it ______ on the floor.
| A．broke in | B．broke down | C．broke up | D．broke out |
The climate of Shanghai is better than ____ of Nanjing.
| A．that | B．it | C．which | D．what |
We think ____ our duty to pay taxes to our government.
| A．that | B．this | C．its | D．it |
____ will do you good to do some exercise every morning.
| A．It | B．There | C．Those | D．You |
The color of my coat is different from ____ of yours.
| A．this | B．that | C．it | D．one |
---- Have you ever seen a whale alive? ---- Yes, I’ve seen ____.
| A．that | B．it | C．such | D．one |