11.Volunteers can do general.....................such as clean-up project or home repair. A. activitiesB. thingsC. labourD. jobs 12.My brother and I...................a white tiger already. A. have seenB. has seenC. seeD. are seeing 13.I................blood twice, and.....................presents to sick children in the hospital recently. A. donate -giveB. donated -gaveC. have donated -have givenD. have donated -gave 14.Volunteering is special.................me because I can help others. A. atB. forC. withD. to 15.How many novels....................Charles Dickens.........................? A. did -writeB. have -writtenC. did -writtenD. does -write 16.We......................to Ha Noi several times, but last summer weby train. A. flew-wentB. has flown –wentC. have flown -have goneD. have flown -went 17.She.................blood twenty times so far. A. donatesB. has donatedC. is donatingD. to donate 18.He...............lectures to foreign tourists about traditional food and games recently. A. givesB. gaveC. have givenD. has given 19.They have decided to clean up the neighbourhood......................it is full of rubbish. A. soB. butC. althoughD. because 20.“Have you ever..........................to Sa Pa? A. arrivedB. beenC. seenD. visited