1.columbus (discover).........America more than 400 years ago 2. It (rain)...................very hard now. 3.the sun (warm) ...........the air and (give).................us light 4. they(come)............here a month ago 5.look! A Man (run)..........after the train. 6.We (go)..................tothe mountains last sunday 7.they (come).........here a month ago 8.albert Einstein (die).......on 18, 1955 9.I (have)........... lunch with dong yesterday 10.they (come)........to see me this morning 11.she (go).......to school everyday 12. bad students never (work)........hard 13.It often (rain)....... in the summer. It (rain).......now 14 the teacher aiways (point)........at the black - board when he (want).......toexplain something