Flying kites, ______ some researchers point out, can not only bring about joy to us, but also promote our physical and mental health.
He left school early, and as an adolescent, determined ______ in South American, set off from his home.
The train arrives in Liverpool at 10 p.m. tonight . The plane I would like to take from there _______by then.
It was quite dark, but I could see a man _____ on the floor ______up.
If you grow up in ______ large family, you are more likely to develop ______ ability to get on well with ________ others.
Children will work actively if _______.