She is a quiet girl at school,but sometimes she _____be very naughty.
Our bodies are strengthened by taking exercise. ________, our minds are developed by learning.
Only after my friend came ________.
It’s a good habit to keep everything ________ in your study.
The angry boy looked at his mother and shouted out the words ________ in his heart for many years.
--- Any good way to get there on time? ---Only by ________.