How can you know whether you will succeed ______ you never try?
—Does coffee really work when you have to work late into night?—Yes. As far as I’m concerned,I feel very________ after a coffee.
When I talked about the thing,I felt Jane watching me uncomfortably,looking________ she wished to speak.
In most western countries on April Fool’s Day,people often play________ trick on each other;children especially have great________ fun.
—Thank you very much for helping me out of trouble,Bob.—________.
“ Will you repeat the question?” “ Certainly. It’s certain that you _____ attention.”
“ Will you repeat the question?”
“ Certainly. It’s certain that you _____ attention.”