The train ____ at present speed until it reaches Beijing.

. Since last year, the global economic slowdown ________ in many countries. It is expected that the world economy will not recover until the end of 2010.

—Do you have enough to________all your daily expenses? —Oh，yes，enough and to spare. 

—Did you ask your elder brother for help?—I          need to. I managed it by myself.

Teenagers       their health because they play computer games too much.