问题
选择题
— Enough sleep is good for teenagers.
— Quite right. If you for your favorite TV programs, you will feel sleepy.
A．set up
B．cheer up
C．pick up
D．stay up
答案
答案：D
词义辨析。set up建立，设立；cheer up（使）高兴起来，（使）振作起来；打起精神；pick up拾起，捡起；stay up熬夜不睡。句意：足够的睡眠对青少年有好处。非常对。如果你熬夜不睡看你最喜爱的电视节目，你会感觉很疲倦。所以选D。