1/3.4+1/4.5+1/5.6+...+1/20/21

v.Chia dạng đúng của các từ trong ngoặc

26.This is an……book.  (Interest)

27.My houseboat wil be…..in the sea.  (Locate)

28.I sometimes do not feel………..when I am at a party.     (Comfort)

29.My future house will have……energy.    (Sun)

30.My neighbor is very kind and ……… .      (Friend)

1/1.2+1/2.3+1/3.4+1/4.5+...+1/99.100

Tìm lỗi sai

we will have more robots although they can help use do homework and protect our houses

there....... 50 people at the party to night