UNIT 3 1 Americans the tradition of volunteering and helping one another since the early days of the country. A.have had B.has had C.had D.to have 2.My brother and I a white tiger already. A.have seen B.has seen C.see D.are seeing 3.Iblood twice, and presents to sick children in the hospital recently. A.donate - give B.donated — gave C.have donated - have given D.have donated - gave 4.How many novelsCharles Dickens? A.does - write B.have - written C.did - written D.did - write 5.Weto Ha Noi several times, but last summer we there by train. A.flew - went B.has flown - went C.have flown - have gone D.have flown - went