________ time went by, we became best friends.
| A．When | B．While | C．With | D．As |
—How many students are there in your school?
—_______ students, I think.
| A．Thousand of | B．Three thousands |
| C．Three thousand | D．Three thousands of |
—What are these?
—They’re _______ and _______.
| A．sheep; hens | B．hens; ship |
| C．horse; sheep | D．sheep; horse |
He has a ____ daughter.
| A．two-year-old | B．tow-years-old |
| C．two years old | D．two-year old |
There is a river ____ my house.
| A．in the front | B．in front |
| C．in the front of | D．in front of |
— What were you doing yesterday afternoon?
— We were singing ____.
| A．all the time | B．always |
| C．on time | D．in time |