By 2150 the rainforests _______ and there won’t be enough oxygen for everyone.
A. have disappeared
B. will have disappeared
C. disappeared
D. will be disappearing

Random Topics:
Present ContinousPresent Simple/AffirmativePassive Voice of TensesModals of Obligation & ProhibitionPrepositions of Time and PlaceModals and Active and Passive VoicePrepositions after VerbsSentences vs Run-OnsConjunctive AdverbPresent Simple & Present ContinuousOther quiz:
Conjunction › ViewIdentify the conjunction in the following sentence: ‘She will go to the beach or the mountains.’
A. and
B. if
C. but
D. or
Past Modals › View
I ___________________________________ (buy) bread but I didn’t know we needed it. (past possibility)
A. could have bought
B. could has bought
C. must have bought
D. should have bought
Grammar › ViewWhich sentence uses a semicolon correctly?
A. Ms. Rodriguez stepped up to the podium, then; she delivered her speech.
B. The educational conference was sold out; in other words, every seat in the room was occupied.
C. Regina, a secondary teacher, Dae-jung, a principal; and Imani, a psychologist, organized the conference.
Adverbs of Frequency › View
During summer holiday Ann goes swimming twice _______.
A. a day
B. on a day
C. at a day
D. of a day
