“把落叶看成美妙的音符,就没有了悲秋之感。”这体现的哲学道理是
Thomas wants to know ______Nina lives.
He didn’t go there yesterday, _______he?
He ______when the UFO arrived. He didn’t wake until the UFO disappeared.
He said that light ______much faster than sound.
I won’t pass the exam ______I work hard.