问题
选择题
Those who don’t get their sufficient sleep are actually sending a(n) _____ to severe problems in their life.
A．invitation
B．warning
C．explanation
D．solution
答案
答案：A
这题考查词义辨析：invitation邀请，诱因， warning警告，explanation解释， solution解决方法。句意是：得不到有效睡眠的人会诱发严重的问题。选A。