--- Could I use your to look up a word ?--- Go ahead . I’m not using it myself .
Liu Lei is_____better at Chinese than Liu Ying.
Who knows the answer______the question?
I think you should tell your partner how ______ popcorn.
---May I have ______ piece of bread with butter? I’m not full. ---Certainly. Here you are.
---______will you be back to the office? ---In half an hour.
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