For a long time, he hesitated whether he should tell us ____ what had happened.
A. at dusk B. at length C. at present D. at stake
.To improve your health, you can _________ 25— 30 minutes three or four times a week to do simple things such as walking ,cycling or running .
A. give off B. turn down C. take over D. set aside
There is even an animal whose tail will so that it can run away if someone grabs it.
A. break up B. break out C. break off D. break down
Founded by Li Kaifu in September 2009, Innovation Workshop is ____ to help Chinese young people create successful starting-up companies
A. commented B. confirmed C. concluded D. committed
The director added a few characters and changed some names in this movie but _______ this is a true story.
A. completely B. necessarily C. essentially D. gradually
— Why do English people talk so often about the weather when they start a conversation?
— Well, it’s probably the weather is a(n) __________topic.
A. safe B. ordinary C. primitive D. conventional
