11.Trust him!He has no difficultyworking(work) out this problem.

分析 相信他!他解出這個(gè)問(wèn)題沒(méi)問(wèn)題.

解答 答案:working.結(jié)合句子的結(jié)構(gòu)have difficulty in doing sth表示做某事有困難,這里是否定,加上no,in可以省略,所給動(dòng)詞work的動(dòng)名詞working,故答案是working.

點(diǎn)評(píng) have difficulty in doing(with) 做某事有困難:其中difficulty是不可數(shù)名詞;可換為trouble; problem; fun等.
  (1)difficulty (通常作復(fù)數(shù)) 難事,難點(diǎn),難題She met with many difficulties when travelling.
  (2)在以下句型中,difficulty是不可數(shù)名詞,不能用復(fù)數(shù)形式.
  have (some) difficulty (in) doing sth.
                                    干某事有困難
there is (some) difficulty (in) doing sth.
  have (some) difficulty with sth.
在某事上有困難
  there is (some) difficulty with sth.

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