— do you speak English so well? —Because I practice it with my partner every day. A. Why B. When C. Who
The dog _______ played with you just now is _______.
Three million _______ a large number. You can make it _______.
Over fifty countries _______ the AIIB(亚投行) so far.
It is _______ a beautiful garden _______ we like to play in it.
The Whites have planned to visit _______ Great wall in China.