When _____ what is most important in life, some choose money, ____ others choose friendship.
3. Remember, Peter, when you learned to drive a car? ______ you drove more, you got better and better. It’s the same with Chinese study.
4. It used to ______ that humans and animals were different and had little in common.
5. The day breaks, _______ the birds are singing.
6. _________, I attended the meeting instead of him last week.
7. When you read the book, you’d better make a mark ______ you have questions.