Although the trffic is not busy, he likes to drive at a_______ speed.
A、spareC
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Many kinds of animals are believed to have _________from the earth
Sometimes it is very difficult to _______ some of the English words. Even the native speaker can not help.
IntheUnitedStates,theforeignpolicyisdecidedbythe________government,notbyeachstate.
Some states in the United States _______ people tocarry guns.
This river forms a natural _______ between China and Korea.