about 150 years ago ,the spanish explorer christopher columbus proved开头的英语完型填空

from 400 years ago和about 400 years ago 区别 it was about 100 years ago Two years ago.about i love you. about 150 years ago ,the spanish explorer christopher columbus proved开头的英语完型填空, about 150 years ago ,the spanish explorer christopher columbus proved开头的英语完型填空 3.He started to collect shells about 4 years ago.( 用for about 4 years 替换4 years ago) about English grammar ,例句three years ago 中的ago是修饰three years __ three years ago.A,since B,for C,about When the first elephants appeared about 40 million years ago. An old lady talked about hei life many years ago. When __the great book About 2000 years ago.(write ) The school (start)150years ago About 2000 years ago,the world's population was p------- about 250 million. Little Jimmy is about seven years old.保持句意不变Little Jimmy ________ _______ about seven years ago. We came here __.A.for three years B.about three years C.for about three years D.three years ago 句型转换 1.Your teacher left here about an hour ago.2.The old men died there years ago. We now know the first dinosaurs_____(出现)about 230 million years ago. We now know the first dinosaurs ___ [apper]about 230 million years ago.