They might just have a place________on the writing course—why don’t you give it a try? 

Seeing the teacher _______ the classroom, the boy pretended _______ the text.

Having mastered the technologies of manned spacecraft, China became the third country in the world ______ manned spaceflight independently.

_________ the project as planned, we’ll have to work two more hours a day. 

Someone took away my umbrella, I’d never expect it _______.