We _____ live in a small flat but last year we bought a house.
| A．would | B．had to | C．used to | D．ought to |
I don’t mind her pointing out my mistakes, but ____ is how she does it that I dislike.
| A．this | B．that | C．it | D．which |
The temperature in this mountainous area ___ from day to day.
| A．ranges | B．exchanges | C．varies | D．transforms |
Looking out of the window of my room, ___ a tall tree in the yard.
| A．there was | B．there were | C．I saw | D．there stood |
---Of ____ two bags, which one do you think is better?
--- _______ smaller one. I prefer how it looks.
| A．the; The | B．the; A | C．a; A | D．a; The |
She owns a lot of books, most of _____ are written in English.
| A．them | B．which | C．what | D．that |