[ Grammar ]
Hi, Quang. It’s mum here.__________all dirty things in the kitchen?
A. Have you been cleaning
B. Have you cleaned
C. Have you been cleaned

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Grammar › ViewJerry always _______________ computer games after school.
A. knows
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Grammar › View
What are non-restrictive clauses also known as?
A. Essential clauses
B. Extra clauses
C. Defining clauses
D. Non-essential clauses
