Although she is in her (八十), Tu Youyou still keeps on doing research on medicine.
Russia is holding the (twenty﹣one) FIFA WORLD CUP now.
Amy practices (play) the piano for over two hours every day.
Doing homework (careful) is a good habit and it helps a lot.
Li Fang is one of the most beautiful (teach) in our country.
It is (polite) to talk loudly in public places like a library.