[ Tenses ]
The earth __________ a crust under the oceans and the land that we live on.
A. is
B. has
C. have
D. are

Random Topics:
Grammar SuffixesModals of ProbabilityPresent TenseSentence TransformationPhrasal VerbsSimiles, Metaphors, Personification and HyperboleInfinitives for reasonsSimple Past TensesSimple Past vs Past Continuous TensePhrase vs ClauseOther quiz:
Grammar › ViewDo you know the man________ lives in the house opposite mine?
A. who
B. what
C. which
D. when
Grammar › View
Do you think it’s ________ be windy tomorrow?
A. going
B. will
C. to
D. going to