[ Grammar ]
Which word fits in the blank?
Dolphins live in groups, and ______ take care of each other.
A. them
B. they
C. these
D. his
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Grammar › ViewWhich word is a singular noun?
A. two dogs
B. cats
C. dogs
D. cat
Grammar › View
As soon as Terry woke up, she started asking her parents and friends if they had any empty soda cans. By now, Terry has thirty cans, and they ___________ up a big plastic bag.
A. fills
B. filling
C. fill