TOEFL COURSES --> TOFEL ITP --> Structure & Written expression
Choose the one word or phrase that best completes the sentence.
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1. During the Precambrian period, the Earth′s crust formed, and life ............... in the seas.
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2. ..............., the outermost layer of skin, is about as thick as a sheet of paper over most of the skin.
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3. The compound microscope has not one ............... two lenses.
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4. Conditions required for seed germination include abundant water, an adequate supply of oxygen, and ................
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5. During the Precambrian period, the Earth′s crust formed, and life ............... in the seas.
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Explain: |