[ Grammar ]
Teachers can tell their students to use mobile apps like “PIAZZA” to access course materials and also to post questions about specific subjects, all ____ can be done in the classroom or outside the classroom.
A. this
B. what
C. which
D. how

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A. studying
B. study
C. studyes
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Complete the sentence with the correct verb form: ‘Charlotte ___ you later.’
A. calls
B. will call
C. will calls
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Someone who has a lot of energy and is very active.
A. bossy
B. graceful
C. energetic