More and more Americans are going to work by bike.Do you know why more people are       bikes to work? We can answer the question in        ways.First, bikes don’t need gasoline （汽油）, so it takes           money to use them.Second, a bike doesn’t        much space （空间）, so it is         to find a place for it.And riding a bike is good for one’s         .People often drive their       _to offices or to shops, but now people think riding bikes is a good way of doing sports.
That’s    more Americans are now going to work   bike, and they are______their own cars at home.

A．making B．riding C．jumping D．believing

A．popular B．different C．famous D．friendly

A．less B．more C．much D．many

A．mend B．need C．have D．find

A．easy B．hard C．cheap D．expensive

A．journey B．health C．study D．work

A．buses B．trains C．cars D．boats

A．what B．why C．how D．where

A．by B．on C．at D．in

A．cleaning B．leaving C．staying D．Learning