Busy as the working mother is, she still_____ a lot of time to her children.
No matter what I do, my efforts ________always end in failure.
The factory used 65 percent of the raw materials, the rest of which _____ saved for other purposes.
There’s nothing more important than good health, _______?
To Daniel’s parents’ surprise, the living room was clean and tidy, with the window ______and fresh air ______in.
William spends too much time in Internet cafes, ________he either plays games or chats on the internet.