Giúp mình làm bài này vs

1./  We believe that bullet trains will be (be) faster, safer and riders can avoid traffic jam.

2./ Helen's mother bought (buy) her thí violin last Christmas.

3./ At the moment these students are collecting (collect) some cardboard for building dollhouses.

4./ Every Friday, Alex joins (join) different community activities with his friends after school.

6./  Scottish people built (build) this castle long time ago.

7./ The plane is carrying (carry) more than 120 passengers at present.

8./ I hope we will own (own) a driverless car in the comming time.

9./ My desktop doesn't work (not work), so I can't send you my email immediately.

10./ I thought (think) Jimmy friendly and generrous when I frist met him yesterday.

11./ Nuclear power (use) will use for heating in the future.

12./ What was you (do) do yesterday morning?

13./ We (travel) will travel to Hue next month.

14./ There (be) is a lot of water in the bottle.