11 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
12.My brother and I a white tiger already.
A. have seen B. has seen C. see D. are seeing
13.I blood 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
14.How many novels Charles Dickens ?
A. does - write B. have - written C. did - written D. did - write
15.We to 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