[ Grammar ]
Most scientists assume that the area ___ by a huge meteorite.
A. must have been struck
B. must have been strike
C. must be struck
D. must have struck

Random Topics:
1st ConditionalNarrative Tenses & ConditionalsPersuasive TextFormal & Informal WordsPresent Simple & Present Progressive TenseAdverbPresent and Future TensesPrepositions of Time & PlacePast Tense vs Future TenseGoing To Be and WillOther quiz:
Grammar › ViewUnscramble the sentence:
twelve/ It’s/ o’clock/.
A. twelve o’clock It’s.
B. It’s twelve o’clock.
C. It’s o’clock twelve.
Subject Verb Agreement › View
Gina’s family _______ huge feet and, therefore, trouble finding shoes.
A. have
B. has