[ Grammar ]
Tomorrow morning, both escalators in the store will be turned off periodically in order to perform _____ maintenance.
A. required
B. requiring
C. requires
D. require

Random Topics:
Noun QuantifiersPrepositions of Time and PlaceReported Speech and TensesParticipal PhrasesSimple Compound and Complex SentencesConditional Type 1Passive Voice - Present ContinuousInfinitive and GerundsPreposition of DirectionGrammar and Verb TensesOther quiz:
Present Continuous Tense › ViewMy mother … fried chicken in the kitchen at the moment.
A. is cooking
B. are cooking
C. am cooking
D. cooks
Mixed General Quiz › View
I will ___ the job that you offered.
a. accept
b. except
If you ______________ the young boy this stick, he would hurt himself.
A. gives
B. gave
C. give
D. had given
Tenses › View
Which of these verbs does not take -ing in the present continuous?
A. think
B. love
C. write
D. eat
