—What _____ Yu Ping usually _____ in her free time?—She usually goes to the library.
-- Mom, when shall we go to Dongying Museum this weekend?-- Oh, sorry. I'm going to Beijing for a meeting. ___Saturday __ Sunday is OK.
—Listen ! Helen is singing in the next room.It ____ be Helen. She has gone to Beijing.
The presidents of China and the USA had ________ interview a short time ago.—And it was ________ great success.
The children are having fun ________ on the playground.
We are supposed to ___________a solution to stop people from looking down at their mobile phones while driving cars.