问题
选择题
__________ sleep every night is important for teenagers. _________, loss of sleep can make you feel tired, and even cause you to put on weight.
A．A good amount of; As a matter of fact
B．A good number of; In truth
C．A large amount of; As matter of fact
D．Plenty of; In a fact
答案
答案：A
考查短语辨析。A good amount of和.A large amount of后修饰不可数名词，A good number of后修饰可数名词复数，Plenty of后修饰可数或不可数名词都可以，短语：事实上As a matter of fact或In fact，根据语境所以选A。