题目：
Come on, Harry, why stand there alone We'll go to play ballgames. How about () us
A．taking part in
B．joining
C．joining in
D．attending
答案：
参考答案：B
解析：
take part in参加活动；join in参加活动；attend参加讲座等。故选B。
Come on, Harry, why stand there alone We'll go to play ballgames. How about () us
A．taking part in
B．joining
C．joining in
D．attending
参考答案：B
解析：
take part in参加活动；join in参加活动；attend参加讲座等。故选B。
