[ Tenses ]
The equipment ______ by the technician before it can be used for the experiment.
A. must be checked
B. must have checked
C. must check
D. must be checking

Random Topics:
Pronouns, Sentence Structure, and Figurative LanguageSports VocabularyOn, At, ByComparison of Adjectives and AdverbsAdverbs of Manner, Likes and PreferencesPast and Past ContinuousToo or EnoughPrepositions & Modal VerbsHas and HaveComparativesOther quiz:
Grammar › ViewWhat time does she (finish) _______ her classes?
A. finish
B. finishes
C. finished
D. finishs
Reflexive Pronouns › View
Hi, Martin! Hi, Rebecca! Please come in and make ______________ at home.
A. yourself
B. ourselves
C. yourselves
D. themselves
Vocabulary Spelling Grammar › ViewFind the correct spelling.
A. retaok
B. redake
C. retak
D. retake
Grammar › View
I’ve walked ten kilometres. My _____ hurt.
A. feet
B. foots
C. footes
