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TOEFL Grammar - Choose the right word

ScottsEnglishScottsEnglish Administrator Posts: 1,296 admin ✭✭✭✭✭✭✭
in TOEFL Test

Choose the correct word for the following sentence:

The cell membrane protects and _________________ the cell nucleus. 

A. contains
B. includes
C. integrates
D. envelopes

Click here for the correct answer:

The cell membrane protects and envelopes the cell nucleus.

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