我国在1961年农业、轻工业、重工业产值之间的比例是21.8∶26.1∶52.1 ;1964年是33.3∶30.3∶36.3。这种比例关系的变化反映了( )
According to the rule,used batteries _______ be dropped in the red bin for harmful wastes.( )
must
need
can
may
Worries in life _____ if you speak out to your close friend.( )
will reduce
were reducing
will be reduced
were reduced
Frank held his breath ______ the water to search for his ring in the swimming pool.( )
at
by
over
under
By the end of last month,Jane _____ enough money for the poor sick boy.( )
raised
would raise
had raised
has raised
Would you mind _____ care of my pet fish while I'm away on holiday?( )
take
taken
to take
taking