There are simply no _____ for buying stock in certain industries since rapidly changing environmental restrictions[阅读全文]
Some paleontologists debate whether the diversity of species has_____ since the Cambrian period, or whether[阅读全文]
It is (i)_____that communism and fascism, two systems of government which in many ways are (ii)_____, lying[阅读全文]
The President reached a decision only after lengthy_____, painstakingly weighing the_____opinions expressed by cabinet members.[阅读全文]
The Roman goddess Venus has had many_____in the Mediterranean world, but today she is most commonly known[阅读全文]
My little borother is studying engineerigng
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