把This is a box and that is a knife.改成複數形式

These are boxes and those are knives.
These are boxes and those are knives.

RELATED INFORMATIONS

1. This is a dress.改為複數形式
2. this的複數是（）foot的複數（) is的複數（）
3. This is a map in English怎麼提問
4. this is a map of china in english對a map of china劃線部分提問
5. This is a book改為複數句
6. 改為複數形式Is that an English book？What“s this in English？It is anegg.Sheis a teacher.
7. How much is this English book？（改為複數形式）
8. This is an orange改為複數句
9. What is this in English？複數形式this（變）under（對應詞）father（對應詞）aunt（對應詞） photo（變）family（變）
10. Is a Chinese map.改為複數句_____Chinese____.
11. This is a box.(改為複數句）是These are boxes.還是These are many boxes.
12. What s this in Engilsh？改為複數形式
13. Is that this watch？改為複數形式還有：The woman is my teacher.
14. it、this、that、is、you這些單詞的複數形式.
15. 英語翻譯 bed的複數形式字典的英文翻譯 key的複數形式桌子的英文單詞以及複數形式椅子的英文單詞以及複數形式
16. 寫出英語單詞的複數形式和現在分詞 boy sheep horse bus tomato bed hat foot butterfly leg swim walk dance run cook eat ride fly wait write
17. staff的複數
18. 寫出下列所給英語單詞的複數形式. 1.dress 2.book 3.coat 4.blouse 5.tourist 6.case 7.handbag 8.officer 9.passport 10.brother
19. 寫出下列單詞的複數形式 1.noodle 2.tooth 3man 4.foot 5mouse 6.pota 7.photo 8family 9wolf 10knife 11woman 12policeman 13bed 14grade 15class 16box 17shelf 18fish 19sheep 20deer 21tomato 22hero 23hamburger 24clouse 25trousers 26shoe 27wife 28half 29church 30jacket 31boot 32sweater 33blouse 34umbrella 35necklace 36dress 37umbrella 38watch 39purse 40city 41monkey 42boy
20. 已知複數z=x+yi9x，y屬於R）滿足！z-1！=1，求複數z的摸的取值範圍