问题
选择题
I tried to work on, but I was so tired that I could no longer _____ .
A．bear out
B．hold on
C．hold up
D．work out
答案
答案：B
短语辨析。 bear out 证实；hold on 继续，坚持；hold up 举起；work out解决，计算出。句意：我试图继续，但是我是如此累，以至于我再也不能坚持了，故选B。