Such changes can alter the social structure, _________ people to move

People in the plane can__________

The computer of the airports have helped people greatly. ______,more people travel by plane in China.

People can help solve the problem of pollution by______.

8．The boy is ________thin __________carry the big box．

People who like dancing can come at____________.

4． People can ________ running everywhere． Do you．know what ______ ?

The homeless make up a growing percentage of America’s population. __1__ homelessness has reached such proportions that local government can’t possibly __2__. To help homeless people __3__ independence, the federal government must support job training programs, __4__ the minimum wage, and fund more low-cost housing.

4． The big bus can carry__________ more people than that small one．

—Can we carry out the plan now? —________.

—Can I drive on the free way, Mr. Green?
—You can when you_____( )______ a bit more skilled.

People in the plane can ______.