被誉为"两弹元勋"的科学家是() A.钱学森 B.竺可桢C.邓稼先 D.袁隆平
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_______ by the air, the kite went up into the sky. A. PushingB. Pushed C. Having been pushed D. Having pushed
_________A. carried B. graspedC. took D. threw
美国1878年宪法最突出的局限性是() A.总统的权力过大 B.大小州之间不平等 C.国会中没有人民选举的代表 D.严重的种族歧视
—Why was he so hot when he got home? —He ________. A. was runningB. is running C. has been running D. had been running