—      useful suggestion he offered to us!—You’re right. It was of great     . 
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How, value
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What, value
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What a, value
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What a, valuable
推荐题目
  ______useful advice it was ! 
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A
How
B
What
C
What a
D
How a
______it is to jump into the river to swim in summer!
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A
What a fun
B
What fun
C
How fun
D
How funny
______ advice it is! I hope you can give me more later.
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What good
B
How good
C
What a good
D
How good a