Many of us might not give second thought to dropping a small piece of litter.

1. Many of us might not give second thought to dropping a small piece of litter.

【考点】

不定冠词;

【答案】

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语法填空（单句）普通

1. In this company, she has worked as a secretary for 5 years, or rather, personal assistant.

语法填空（单句）容易

2. Could you do me favour and pick up Sam from school today?

语法填空（单句）容易