--- You must be thirsty after a long walk. Would you like some ______?
--- Yes, please. Thanks a lot.

A．water

B．bread

C．food

D．hamburgers

Though their parents work faraway cities to make money, these “stay-home children” can _______ themselves.

A．take care of

B．take after

C．take up

D．take off

--- The Internet has become not only a necessary but also a virtual (虚拟的) world for teenagers.
--- Yes, teenagers should learn to _______ invitations from net friends and can’t go to meet them alone.

A．pull down

B．write down

C．turn down

D．close down