单选题
1分
Donald Trump has signed an executiveorder ___________ a "large physical barrier" between the US andM...
Donald Trump has signed an executiveorder ___________ a "large physical barrier" between the US andMexico.
参考答案: A
参考解析: 考查动词短语辨析。句意为“特朗普已经签署一项行政命令，要求在美国和墨西哥之间修建一座‘巨型物理屏障”’。call for“要求，需要，规定”，call on“号召，拜访”，call in“召集，叫……进来”，call up“给……打电话，召集”。A项最符合题意。