---Why do you keep the windows open on such a cold day?
---There are so many students here, so we want to keep the air nice and __.
| A．cold | B．dry | C．cool | D．clean |
This piano is too big. Can you make ________ for it?
| A．a space | B．some spaces |
| C．some more rooms | D．some space |
There was _______terrible earthquake in 2011 in Japan! It killed _______ people.
| A．/, thousands of | B．/, thousand |
| C．a, thousands of | D．a, thousands |
There __________ some children in the painting room. They are studying painting.
| A．is | B．are | C．am | D．was |
The geography teacher told us the earth________ bigger than the moon.
| A．is | B．was | C．isn’t | D．wasn’t |
I can’t find the bookstore _____ my father bought the book for me yesterday.
| A．who | B．which | C．when | D．where |