[ Grammar ]
Every part of the world _____ by now.
A. Was explored
B. Were explored
C. Are explored
D. Has been explored

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Grammar › ViewCorrect the mistake
Listen! They play the trumpet.
_
A. plays
B. are playing
C. playing
D. is playing
Grammar › View
Which word is misspelled
A. absorbent
B. interfere
C. contiguos
D. barbaric