We can never forget the days _______ the two astronauts in spaceship worked together and the days ________ we spent together.
—Why was Mr. Liu thundering in the classroom yesterday? — A student’s interrupting his speech _____the burst of his anger.
Tommy, you____ be hooked on the Internet all day. You may fall behind others in study.
— Did you happen to hear the recent news? —Yes, Alice ____ the entrance examination, which I find hard to believe.
I had planned for the housecloser to a river, but I was told there was a danger of flooding.
—Must I turn off the gas after cooking? —Of course, you can never be ____careful with that.