Though he is always thinking much of himself, he ______ be helpful when staying with others.
-- What’s the matter with you? ---____ the window, my finger was cut unexpectedly.
--You were brave enough to raise objections at the meeting. ---Well, now I regret____ that.
--You didn’t wait for Mike last night, did you? ---No, and we____ for him. He didn’t return home at all.
___ is known to all, China will be an _____ and powerful country in 20 or 30 years’time.
I remember a ____ famous scientist said that we should believe in ourselves first of all.