选择括号内恰当的单词或词组填入空白处，使句意完整、正确。
–_______________ (Whose / Which) bag is this?
–I guess it’s Jack’s.
-3. –What’s the __________(price / color) of your new shirt?
–One hundred yuan.
–Could you tell me how to be a greener?
–No problem. We should save _______________ (money / water) in our daily life.
As we know, English is __________ (wide/widely) used around the world.
–It’s snowing heavily at the moment, isn’t it?
–Yes. We’d better ______________ ( put on / take off ) more clothes before starting.