托业考试

【单选题】______ in the costs of basic materials, including copper, cement, and even plywood, have made it virtually impossible for construction firms to accurately forecast their spending.
A、Invitations
B、Exposures
C、Fluctuations
D、Allowances
网考网参考答案：C
网考网解析：
[词汇] fluctuation波动 [错误答案] (A)邀请(B)暴露(D)折让，津贴 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>