19.We started learning English 4 years ago/in 2018
=>We have...
20.Mr Smith will collect the tickets
=>the tickets...
21.Get up early or you will miss the first bus
=>If you...
32.My father cleans the car every week
=>The car...
33.They have provided the victims with food and clothing
=>The victims...
11.Keeping the environment clean is very important
=>It...
12."I will have an English test tomorrow"
=>He said that...
14.Althought they were tired ,they tried to finish their project on time.
=>In spite of...
15."We may go sightseeing in Sapa next week "
=>My friends told me that...
18.I last visited London was two year ago
=>I haven't...
19.We started learning English 4 years ago/in 2018
=>We have learned English for 4 years.
20.Mr Smith will collect the tickets
=>the tickets will be collected by Mr, Smith.
21.Get up early or you will miss the first bus
=>If you get up late, you'll miss the first bus.
32.My father cleans the car every week
=>The car is cleaned by my father every week.
33.They have provided the victims with food and clothing
=>The victims had proviced with food and clothing.
11.Keeping the environment clean is very important
=>It very important to keep the environment clean.
12."I will have an English test tomorrow"
=>He said that he would have an English test the day after.
14.Althought they were tired ,they tried to finish their project on time.
=>In spite of they were tired, they tried to finish their project on time.
15."We may go sightseeing in Sapa next week "
=>My friends told me that they might go sightseeing in Sapa the following week.
18.I last visited London was two year ago
=>I haven't visited London for two years.