3.(2019浙江嘉兴回头检测,64)ESA also wants to help businesses on Earth develop tools and technology　　    will allow people to live on the Moon.

答案　which　考查定语从句。句意:欧洲航天局还希望帮助地球上的企业开发工具和技术,使人们能够在月球上生活。此处,所填单词引导定语从句,修饰tools and technology,作从句的主语,故用which。

4.(2019浙江建德期末联考,56) I like the monitor Charlie as well,　　     has a funny face but works very hard.

答案　who　考查关系代词。句意:我也很喜欢班长查利,他有一张看上去滑稽的脸庞,但是工作非常努力。所填单词引导非限制性定语从句,先行词是the monitor,设空处在定语从句中作主语,故填who。