Words you might found difficult:
addiction:[i]Something you can't stop doing[/i].
Ex1:Her previous novel dealt with her recovery from drug [b]addiction.[/b]
ex2:[i]Patrick is trying to cure himself of his [b]addiction[/b] to alcohol[/i].
According:as stated by.
Ex1:[b]According [/b]to Sarah they're not getting on very well at the moment.
Ex2:[b]According[/b] to our records you owe us $130.
Surfing:[i]to spend time visiting a lot of websites.[/i]
Ex1:Many towns and cities have cybercafés where you can [b]surf[/b] the Internet.
Ex2:I was [b]surfing[/b] until midnight last night.
Estimate: [i]an approximate calculation or judgment of the size, value, amount, cost, etc.[/i]
Ex1:We'll accept the lowest of three [b]estimates[/b] for the building work.
Ex2:The number of people who applied for the course was 120 compared with an initial [b]estimate[/b] of between 50 and 100.
Symptoms:[i]any feeling of illness or physical or mental change which is caused by a particular disease.[/i]
Ex1:He's complaining of all the usual [b]symptoms[/b] of flu - a high temperature, headache and so on.
Ex2:He's been HIV-positive for six years, but just recently he's started to develop the [b]symptoms[/b] of AIDS.