2. 外语
  3. Who______how many offices we have contacted for the survey?

Who______how many offices we have contacted for the survey?

admin2015-03-21  31
问题 Who______how many offices we have contacted for the survey?
选项 A、knows
B、know
C、is knowing
D、are knowing
答案A
解析 Third-person present tense is required. Choice(B)does not agree with who. Choices(C)and(D)are continuous forms, which are rarely used with stative verbs.
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