Is__________ with these troubles in mind__________ the Royal Society called for the world’s governments to investigate geo-engineering as a “Plan B”?
When ______ about the secret of his success, Steven Spielberg said that he owes much of his success and happiness ________ his wife and children.
To enjoy the scenery, Sara would spend long hours on the train ______ travel by air.
The audience ______ when they heard the humorous story.
—I’m sorry.That wasn’t of much help. — Oh, _______ . As a matter of fact,it was most helpful.
— What about ______ lecture you attended yesterday? — To tell the truth, it was too boring.I can't stand ______ lecture like that.