I felt it hard to keep up with my classmates. But when I want to _____, my teacher always encourages me to work harder.
与r相邻的字母是________.
--- If I_______ one million dollars, I would give it to medical research. ---If I _______ you, I would give it to charity.
I like singing and ________ Tom.
Helen ________watch TV at home _______ hang out with her friends.
---____ do you study for a math test? ---I study math ____ lots of exercises.