问题
选择题
The poor boy _____ the test again; in that case, his mother will be very disappointed.
A．must have failed
B．might fail
C．could have failed
D．should fail
答案
B
从后文的将来时可以断定考试的结果还不确定，只是在进行推测，故排除A、C，D的语气不对，只有might表示语气不确定的“可能”，符合题意。