单选题Why the explosion occurred was _____ the laboratory attendant had been careless.AforBbecauseCsinceDthat
单选题
Why the explosion occurred was _____ the laboratory attendant had been careless.
A
for
B
because
C
since
D
that
参考解析
解析：
句意：发生爆炸的原因是做实验的人太粗心。that引导的是表语从句，解释说明主语的内容，前面则是由why引导的主语从句。
句意：发生爆炸的原因是做实验的人太粗心。that引导的是表语从句，解释说明主语的内容，前面则是由why引导的主语从句。
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