Since there is abundant food in the sea, it is understandable that some of the creatures that evolved on land __________ to the sea.
A. would have returned B. could have returned
C. might have returned D. should have returned
Since there is abundant food in the sea, it is understandable that some of the creatures that evolved on land __________ to the sea.
A. would have returned B. could have returned
C. might have returned D. should have returned
D