Chủ đề:
Chủ đề 7: Xác định số oxi hóa của các nguyên tốCâu hỏi:
1/ Cl2 + H2O --> HCl + HClO
2/ Fe304 + HNO3 ---> Để(NO3) 3 + NO3 + H2O
M.n giúp em giải 2 bai nay với 🤔🤔
1/ I have finished the job
2/ the cat has drunk the milk
3/ the girls have plucked the flowers
4/ I have watched the movie
5/ Peter has broken another window
6/ I hve written six letters
7/ I haven't received the parcel
8/ Have they accepted the invitation
9/ I have known her for a long time
10/ Our team has won the championship
11/ Nobody has approved Joana's suggestions
12/ she has not written a story
13/ she has not cheated anybody
Exercise 2: complete the sentences ( active or passive voice) .use pprfect
1/ the car( steal).......
2/ I ( bake) ............a cake
3/ my friend ( buy) ..........a house
4/ the cup( put) ..........on the table
5/ tress ( plant)...............in the street
6/ the boy ( fall/not)..........off his bike
7/ I ( bite/ not)................. by a snake
8/ he ( step)...............on my toe
9/ we ( walk)..............all the way home
10/ she( pick up) ...........by a friend
11/ the bank robbers( arrest)................
12/online shopping ( save)..............a lot of time
13/ harsh( gift)..............a new car to his mother
14/ the work ( finish)................by him at full speed
15/ a cake ( make)..................by me