试题题干
WORD FORMATION
Complete each of the following sentences with the proper form of the word in brackets.
(high) This could
trade tensions between these two superpowers.
参考答案
试题解析
本题考查常见形容词的派生动词。
由情态动词could和名词短语trade tensions可知，空缺处应填动词作谓语，high是形容词意为“高的”，其名词形式是height意为“高度”，加上动词后缀-en变成动词heighten意为“增强”，符合题意。
句意：这可能加剧这两个超级大国之间的贸易紧张关系。