问题补充:
Because he is head of the government, he is supposed .
A. /; to taking
B. /; to take the lead
C. the; taking the
D. the; taking
答案:
A. /; to taking
(答案→)B. /; to take the lead
C. the; taking the
D. the; taking
解析:考查冠词和固定搭配。职务、头衔前面不能加冠词,head在此意为“首长,首脑”,前面不适用冠词,排除C、D;be supposed to do sth应该做某事,排除A。故选B。