2. 外语
  3. All you do now is ______ the housework before your mom arrives home.

All you do now is ______ the housework before your mom arrives home.

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问题 All you do now is ______ the housework before your mom arrives home.
选项 A、having finished
B、finish
C、finishing
D、to have finished
答案B
解析 在SVC(主、系、表)句型中，如果主语部分有实义动词do的某种形式，则作表语的不定式既可带to也可不带to。所以，正确答案为选项B，D的不定式时态不当。
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