He sat at the desk, __________ a novel.
At the routine office meeting, the headmaster insisted that the problems _______ paid special attention to.
_______ basic first-aid techniques will help you respond quickly to emergencies.
People develop _______ preference for a particular style of learning at _______ early age and these preferences affect learning.
—Is the chemistry experiment easy? —______. I’ll just do my best.
The number 5.12 is a special number,__ ,I think, that will be remembered by Chinese people forever.