Last month, the Japanese government expressed their thanks for the aid they ________ from China.
A．receive
B．are receiving
C．have received
D．had received
Last month, the Japanese government expressed their thanks for the aid they ________ from China.
A．receive
B．are receiving
C．have received
D．had received
D
解析：由于expressed their thanks的动作发生在上个月，所以日本政府收到的中国援助应发生在过去的过去，因此此处应用过去完成时态。由句子的时间状语last month可知，该句的时态不是现在的时态，由此排除表示现在的A项、B项和C项。句意：上个月，日本政府为他们收到的来自中国的援助表示谢意。故选D项。