This is linda and her family, they/their are in the livingroom, sara is lindas mum

Ответ будет "they", так как 'they'-это местоимения (они), а "their"- это "их" указательное местоимения. переводится как: "они в зале, сара мама линды"

At 5.30 in the morning the radio screams and monica (opens) her eyes and (throws) the covers off. she (puts) on a t-shirt, trackpants and sneakers, (picks) up her gym bag and (hurries) to her club. her daily routine seldom (changes). she (goes) to her locker, (hangs) her clothes, and (does) her stretches. she (knows) some people in the club, but she does not (like) to chat with them. she (takes) her exercise very seriously. she (has) breakfast on the way to work. it (is) always the same thing every day: a cup of coffee and a dry roll. she does not (have) time to sit and enjoy it. she (tries) to visit her gym five times a week and when she (is) home early and (has) nothing to do, she (goes) to the gym a second time in the evening. and of course there is work. the more she (works), the better she (feels), the less she (thinks) about her personal life.