The elderly/old/aged man was too tired to move ________
E) the other foot F) other foot
An American scientist reported an unexpected and __________ discovery.
In the experiments, the scientists found that water __________ at 100℃.
I am sure your parents are proud __________ you.
—Are you used to __________ in the north with the old couples? —Yes, I am glad to find out that coal is used __________ electricity for home use.
__________ be late for the first class, Bill took a taxi instead of riding to school that morning.