问题补充:
Our headmaster will us in the discussion this afternoon.
A. take part in
B. join in
C. join
D. attend
答案:
A. take part in
B. join in
(答案→)C. join
D. attend
解析:take part in指参加活动或在活动中负有责任;attend仅仅表示“to go”,自己并不起积极作用;join in参加(活动);join是及物动词,意思是参加,加入(团体)。经过比较,选C最好。