1.Find and correct a mistake in each sentence below. 1.There (A) are 54 (B) people in Vietnam.They (C) live in (D) peace. 2.This task is (A) complicated. (B) I can (C) do it (D) by myself. 3.My (A) hometown has only (B) an university,which (C) is 100 years (D) old. 4.(A) Among the (B) apples on the (C) table, it's (D) a biggest one. 5. (A) It's done. (B) What (C) you are going to do (D)next? 6.Should we (A) be (B)exciting (C) about calm (D)technology? Những từ gạch chân trong câu: 1.are,people,live,peace 2.complicated,I,do,by 3.hometown,an,is,old 4.Among,apples,table,a 5.It's,what,you are,next 6.be,exciting,about,technology 2.How can we better our communication by using modern technology?Write a 80-to-100 word paragraph to share your ideas and advice using can,may,should,must and have to.