I want to know _______. |
A. what is he doing B. is what he doing C. what he is doing D. he is doing what |
How many ______ do you have? |
A. pair of sock B. pairs of socks C. two pair of socks D. two pairs of socks |
You can see ________ birds in the park. |
A. two thousands B. thousands C. two thousand of D. thousands of |