Without proper lessons, you could _____ a lot of bad habits when playing the piano．
A．put up B．draw up C．pick up D．grow up
---Will you tell the secret to Tom?
---No way! ________ I’m asked to．
A．Unless B．When C．Until D．Even though
Little as he is, Tom, like his parents, ______ others who are in need．
A．are always helping B．has always helped
C．is always helping D．have always helped
-----I am leaving for the States tomorrow for a holiday, Caroline!
----- ．
A．All the best! B．Take your time．C．Well done! D．That’s OK．
With an online course Lynn has over 300, 000 students all over China ________her class through the Internet．
A．are attending B．attended C．attend D．attending
There is a real danger ______ the U．S will not keep its position on the world economic stage．
A．where B．that C．which D．one
