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

Random Topics:
BASIC GRAMMAR - PRONOUNSAdjectives & PrepositionConjunctions and PronounsConjunctions in Complex SentencesSimple Past vs Past Continuous TenseSingular and Plural NounsConditional and SubjunctiveMay, MightPast Simple & Past PerfectMesopotamia VocabularyOther quiz:
Present/Past/Future Continuous Tense › ViewMy aunt …………….. (Open) her new restaurant in town. (Future)
A. was opening
B. is opening
C. will open
D. will be opening
Grammar › View
The hotel where we usually spend our holidays is closed. ………………., we need to find another one.
A. However
B. At last
C. Therefore
D. In particular
Grammar › ViewCompanies routinely give a two-weeks vacation to employees who have completed their first year of service. Which one is incorrect word/phrase?
A. give
B. two-weeks
C. have
D. their
Grammar › View
Someone who has a lot of energy and is very active.
A. bossy
B. graceful
C. energetic