15. Frank was doing his homework_______his brother waswatching TV.(A) because (B) since (C) while (D
16. Many people told me_______ take a picture with the bridebecause I was born in the Year of the Ti
17. Jack_______basketball with his teammates when theircoach came to the field.(A) will play (B) was
18. Jason_______ his house before you knocked on the door.(A) has left (B) was leaving (C) leaves (D
19. A: You failed the test._______B: I didn’t prepare for it.(A) How come? (B) Who made you say so?(
【題組】29. (A) what reason it is(B) how new your bicycle is(C) how expensive your bicycle is(D) how old