1 are

Vì My friends and I là số nhiều nên be là are

2 is wearing

Ta chia thì HTTD : S + Be + V-ing

3 standing

Đã có be ở trước nên ở đây V -> V-ing chứ ko thành is standing

4 are drinking

Ta chia thì HTTD : S + Be + V-ing

Some guests là số nhìu nên + be là are + V-ing

5 are dancing 

Ta chia thì HTTD : S + Be + V-ing

Some of her relatives là số nhìu nên + be là are + V-ing

6 are sitting 

Ta chia thì HTTD : S + Be + V-ing

7 enjoying

Đã có be ở trước nên ở đây V -> V-ing 

Ta chia thì HTTD : S + Be + V-ing

8 chatting 

Đã có be ở trước nên ở đây V -> V-ing

Ta chia thì HTTD : S + Be + V-ing

9 go

Ta chia thì HTĐ : S + Vs/es

DHNB : often

10 dress 

Ta chia thì HTĐ : S + Vs/es

DHNB : always

11 travel

Ta chia thì HTĐ : S + Vs/es

DHNB : always

12 make

Ta chia thì HTĐ : S + Vs/es

DHNB : never

It (0. be) is Sunday evening and my friends and I (1. be) are at at Jane's birthday party. Jane (2. wear) is wearing a beautiful long dress and (3. stand). standing next to her boyfriend. Some guests (4. drink)are drinking wine or beer in the corner of the room. Some of her relatives (5. dance) are dancing in the middle of the room. Most people (6. sit) are sitting on chairs, (7. enjoy) enjoying foods and (8. chat) chatting with one another. We often (9. go) go to our friends' birthday parties. We always (10. dress) dress well and (11. travel) get there by taxi. Parties never (12. make) make us bored because we like them