电子课本网 第46页

第46页

信息发布者:
screen
online
channels
keyboard
received
mice/mouses
programme
videos
units
control
to collect
receiving
have searched
chatting
looked
uses the computer to do word processing
Have you finished the programme
the mice looks like mine
is searching his office for his lost keyboard
ask him for help
something wrong with your main unit
Has
 been on for half an hour
How often does 
use the mobile phone to watch videos
has changed the channel many times
to collect
句意:
杰克经常用这个工具在公园里捡垃圾。 

collect收集,结合语境可知,意思是使用这个工具来捡垃圾,use sth. to do sth.使用某物做某事,故填to collect。
receiving
句意:
收到我的信后请尽快给我回信。 

receive收到,结合语境可知,意思是收到我的信后请尽快给我回信,介词after在...之后,后跟动词要用doing形式,故填receiving。
have searched
句意:
为了找到我丢失的手表,我到处都找遍了。接下来我该做什么? 

search 搜寻,结合语境可知,意思是已经到处都找遍了,还是没有找到,表示过去发生的动作对现在造成的影响或结果,时态用现在完成时,结构为have/has done,主语为I,search的过去分词为searched,故填have searched
chatting
句意:
这个男孩很害羞,他习惯于在网上和朋友聊天。 

be used to doing sth.习惯于做某事,这里意思是习惯于在网上和朋友聊天,chat的现在分词为chatting,故填chatting。
looked
句意:
乔小时候长得像他妈妈,但现在他变了。 

look like看起来像,这里意思是乔小时候长得像他妈妈,由when he was a child可知,时态要用一般过去时,故填look的过去式looked。