问题
选择题
Not only ________learn a foreign language, but also ______ master it well.
A．must we ; we must
B．must we ; must we
C．we must ;’ we must
D．we must ; must we
答案
答案：A
题目分析：句意：我们不仅必须学习一门外语，而且我们必须掌握好它。Not only放在句首，句子用部分倒装，but also放在句首，句子不倒装，所以选A.