6 Choose the best answer A, B, C or D to complete the sentence. Question 12. He asked me what the conservationists __________ so far to protect our environment. A: do B: have done C: did D: had done 7 Choose the best answer A, B, C or D to complete the sentence. Question 9. What __________________ if you saw a UFO? A: did you do B: will you do C: do you do D: would you do 8 Choose the best answer A, B, C or D to complete the sentence. Question 8. He was the first man _______________ to help the flood victims. A: arrived B: to arrive C: arriving D: arrive 9 Choose the correct sentence (A, B, C or D) made from the suggested words. Question 23. you/ know/ how much/ time/ he/ spend/ surf/ web/ a day? A: Do you know how much time he spends surfing the web a day? B: Do you know how much time does he spend surfing web a day? C: Do you know how much time does he spend surfing the web a day? D: Do you know how much time he spends to surf the web a day?