1._ a webpage
2.how to download something _ a website _ a device
3.available _
4.to hold _ a computer
5.to sit _ the computer
6._ social networks
7._ social media
варианты: in, on, from, at, for

how do you keep fit?

при построении вопросительного предложения сначала ставится вопросительное слово (в данном случае это "how"), затем глагол (do), затем подлежащие и сказуемое

a"where`s tom? "

"he is having a bath."

b."do you want an ice-cream? "

"no,thanks. i don`t eat  ice-cream."

c.we can't play tennis because it is raining.

d.i don`t understand what you are saying.

e.what are you doing tonight?

  how long have you been trying to find a job?

for three years. it was really difficult.

how many jobs have you had?  

about thirty, maybe more i have been doing everything.

how long have you been standing here today?  

i have  been waiting since 8: 00 this morning, and i'm freezing.  

наипишите о том,как дедёныши животных растут.