7. When you read the book, you’d better make a mark ______ you have questions.
Many people spend half their time______ways of getting rich.
He_______just before the concert started.
--- How do you find the concert in the Beijing Grand Theatre last night?--- _________. But the conductor was perfect.
I ________ to help you with your homework, but I couldn’t spare any time. I ________ a composition last night and I’ll finish it today.
Without facts, we can’t form a correct opinion, for we need to have actual knowledge _______ our thinking.