--I'm sorry I made a mistake!-- Nobody is perfect.
She is—how shall I _____ it? ---not exactly fat, but rather well-built.
It was the training _____ he had as a young man _____ made him such a good engineer.
_____ you come across new words, don’t refer to your dictionary at once but guess their meanings according to the context.
He found _____ not easy to learn a foreign language well.
It was reported _____ a 7.1-magnitude earthquake hit northwest China’s Qinghai Province early on Wednesday.