[ Grammar ]
America __________ more than 400 years ago.
A. discovered
B. has discovered
C. was discovered
D. discovers
Select your answer:
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Grammar › ViewWood is opaque but glass is ……
A. Hard
B. Smooth
C. Soft
D. Transparent
Basic Grammar › View
_____ colour is a polar bear? It is white.
A. What
B. Where
C. When
D. Why