We should often help _______poor.A. a B.不填 C. the
Jackfailedtopassthefinalexam. ---_______.
We_______sixdaysaweek,butweonlyworkfivedaysnow.
—When _______ this stone bridge______ ? —In 1935.
They were _______ when they heard the _______ news.
I _____ singing to dancing.