信用证的各类按付款时间可分为（）
A、即期信用证
B、远期信用证
C、延期信用证
D、预期信用证
参考答案：A, B, D
请简述麦格纳重整的特点。
Neither Mary nor her brother ______ good at singing.
A. is B. areC. is not D. are not
