While typing, Helen has a habit of stopping ______ to give her long and flowing
题型：不详难度：来源：
While typing, Helen has a habit of stopping ______ to give her long and flowing hair a smooth.| A．now and then | B．over and over | C．up and down | D．here and there |
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答案
| Ａ |
解析
| 词义辨析。Ａ时而不时；Ｂ一再；Ｃ上上下下；Ｄ到处。结合句意可知Ａ正确。句意：在打字的时候，Ｈｅｌｅｎ有时而不时停下来的习惯，让长长的头发顺下来。 |
举一反三
| His hard work paid______ when he got the result. |
When Helen saw his tutor nod ________ to her, she calmed down and went on with her performance. | A．encouragingly | B．amazingly | C．interestingly | D．astonishingly |
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