which one - the red one or the blue one?这里面的横线起什么用?

Which books are older? The red ________ (one). 急 which one - the red one or the blue one?这里面的横线起什么用? 用longer、red、yellow、the、the、which、is、pencil、or、one、one?联成句子 Which skirt is _______(cheap),the green one or the red one? Which one do you like____(good),the red one or the blue noe? which box is () the red one or the white one开头是H ----Give me that pan.----Which one?----_________on the desk.A.The red B.The one is C.The red one D.Rad one Which is the ——（good）,the green one ,the yellow one or the red one? Which is your pencil?______.A,The one red.B,The red one.C,A green one.D,It's green _is your English teacher?The one in red A who B which C what D where —__is your ruler?—The red one.A:Whose B:What C:Which选哪个 Which butterfly do you like?The red and purple one.(复数) ——which car is better,the red one or the black one?——i prefer the red one,but it is really a——which car is better,the red one or the black one?——i prefer the red one,but it is really a matter a personal ____.A.taste B.style C.affair D which bag do you want?(用the red one和the black one改写为选择疑问句) what about the red one? which is your pen a .a red one and a blue one b.a red one or a blue one c.the red oneand the blue one d,the red one or the blue one哪个对?请说明理由—— The red rose is the only one _____I real like.A which B who C that D whom There are several story-books Red Star is the best one I have ever readA whose ;that B of which ;that C which ;that D of which ;as