问题

He was seriously injured last week and that’s _______ he didn’t participate in the competition.
A:when
B:how
C:why
D:what
B:how
C:why
D:what
正确答案是:
同类题型
eks left lying on theroad with no one offering help, _____ a heated discussion on the Internet .
t the Internet, those who are disabled _____ fewer avenues to meet people outside.
Many Chinese students found______ difficult to learnEnglish grammar.
He _______ go out with his parents, but now he _______ staying at home alone.