---Mary was asked to do something important.---It doesn’t matter. Let’s the work where it is left off.
The novel was concerned ______ the Second World War, while most readers are more concerned _____ the hero's love story.
The police chief advised his men to keep________ and not lose their tempers.
Generally speaking, ______according to the directions, the drug has no side effect.
Please _____all the numbers. Those numbers______10,000.
---Kevin, you look worried. Anything wrong ? ---Well, I _____ a test and I’m waiting for the result.