下列四个实验中只需完成三个就可以证明 F e , C u , A g 三种金属的活动性顺序,其中不必进行的是( )
My parents have a lot of housework .( )
do
to do
doing
You'd better your coat,it's very cold outside.( )
wear
put on
dress
Where's my ruler?I can't it anywhere.( )
look for
find out
find
Could I ask you some questions?
Yes,you .( )
can
could
must
she is only seven,she can cook dinner.( )
But
So
Though