[ Grammar ]
Animals often _______ body language to talk to one another.
A. use
B. used
C. have used

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Grammar › ViewThe thieves stole the necklace ______ it was very valuable.
A. so
B. if
C. because
Grammar › View
We ___ closer as a team since we started this new project.
A. have grown
B. grow
C. grew
D. have been growing