Don't put the plate ________ of the table, ________ it will fall down．A.on the side; andB.at the edge; orC.at the side; orD.on the edge; and
网友回答
B解析该句是由并列连词or连接的两个并列分句．第一个并列分句是祈使句时则相当于if从句，即If you put the plate at the edge(桌子边/缘)of the table, it will fall down．