—Tom, you didn’t come to the party last night? —I __________, but I suddenly remembered I had homework to do.
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.
My mother is always warning me when I go out, “Don’t get off the bus ____it is stopping.”