It’s necessary _____ the dog’s fur and play with it for _______.


  1. A.
    brushing, sometimes
  2. B.
    to brush, sometime
  3. C.
    brushing, sometimes
  4. D.
    to brush, some time
D
第一空只能用不定式作主語(yǔ)（it是形式主語(yǔ)）；sometime：過(guò)去或未來(lái)的一個(gè)時(shí)間點(diǎn)，some time：一些時(shí)間，即分開(kāi)是“一段”， 相連為“某時(shí)”。根據(jù)句意，第二空前有介詞for,應(yīng)跟一段時(shí)間some time。故選D。
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Dear Donna,

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