成人英语三级考试

【单选题】______ a satisfactory answer, so he had to write to them a gain.
A．As he hadn't received
B．Not having received
C．Having not received
D．He hadn't received

网考网参考答案：D
网考网解析：
本题考查的是简单句与并列句的区别。根据so一词可以看出这是两个并列句，而不是一个简单句，所以前面也是完整的句子，所以选D。因为…所以，在英语中这两个连词不能同时用，故不选A。 查看试题解析出处>>