问题补充：
用括号内所给动词的适当形式填空。
【小题1】We were watching, playing(watch) the boys happened(play) basketball on the playground when something strange happened.
【小题2】I don’t know what to play (happen)to him just now.
【小题3】Computers are useful to us. But some students only use them taking (play) games.
【小题4】–--Would you mind is finished(take) photos with me?
--- Of course not. When I miss you, I can have a look.
【小题5】You may go to play football as soon as your homework are told(finish).
【小题6】Middle school students (tell) not to smoke.
答案：
解析：
【小题1】本题的含义为当某事发生的时候我们正在操场上看男孩们打篮球，表示过去正在做某事用过去进行时，本题主句为复数，故结构为were watching，看某人正在做某事可以写成watch sb doing，故本题空格处填were watching, playing。
【小题2】表示过去发生的事用过去时，故本题空格处填发生的过去式happened。
【小题3】使用某物做某事可以写成use sth to do，故本题空格处填to play。
【小题4】mind后通常跟动名词doing作为宾语，故本题空格处填taking。
【小题5】本题as soon as后跟的从句主语为动作的承受者，故从句使用被动的结构be+过去分词，故本题空格处填is finished。
【小题6】本题的主语为动作的承受者，故本题使用被动结构be+动词tell的过去分词，故本题空格处填are told。
用括号内所给动词的适当形式填空。【小题1】We were watching playing(watch) the boys happened(play) basketball o
