Choose the option that completes the second sentence so that it means the same as the first, using the key word.

First sentence: He was so tired that he couldn't keep his eyes open.

Key word: TOO

Second sentence: He was ___ his eyes open.

Answer and explanation

Correct answer: D. too tired to keep

  1. Step 1: Check what grammar the key word needs. Step 2. 'Too' + adjective + 'to' + infinitive shows the result. Answer: too tired to keep. Why not the others: The others use the wrong structure.

Practise more Key word transformation.

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