解析：In the period between 1918 and 1939_考试试题_托福

【单选题】In the period between 1918 and 1939, various political, economic, and geographic (factors combined) in (determine) the extent (to which) a country (developed) civil aviation.
A、factors combined
B．determine
C．to which
D．developed

网考网参考答案：B
网考网解析：
暂无解析 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>