After climbing the hills in the natural park for hours, my legs _   under me and I failed to keep pace with others.
#64311
A
gave out
B
gave up
C
gave in
D
gave away
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 He ______ to get out of trouble, but no one would help him.
#80696
A
succeeded
B
attempted
C
managed
D
offered
The stones each ________ as much as two tons.
#68998
A
weighs
B
are weighed
C
weigh
D
is weighed