根据句意,用括号中所给词的适当形式填空,
To better understand the habits of elephants, the government spent a lot of money doing (科学研究).
在上学路上,西蒙看见了一道美丽的彩虹.
Simon saw a beautiful rainbow school.
王俊凯擅长唱歌和打篮球.
Wang Junkai singing and playing basketball.
如果你能告诉我机器人已失控多久,那就太好了.
It would be great if you can tell me .
出于安全原因,这次年终特价优惠最终被取消了.
The end﹣of﹣year at last.
写作占去了我四分之三的假期,但我乐在其中.
Writing my holiday, but I enjoyed myself.