If you do things ________, usually you can’t do them well.
The wetland can ________ food and shelter ______ plants and animals, including different kinds of birds.
You will find _______ useful to learn even a little English.
–-What do you think of _______ phone you bought last week?---It’s really________ ideal one for me.
The museum _______ from 9:00 a.m. to 5:00 p.m. every day. Let’s gotogether this Sunday.
Li Lei plays football very ______. He is a ______ football player.