Correct the sentence: You have been working very hard for the last two years. Isn’t it?

A. You have been working very hard for the last two years. Hasn’t you?
B. You have been working very hard for the last two years. Haven’t you?
C. You have been working very hard for the last two years. Hadn’t you?
D. You had been working very hard for the last two years. Haven’t you?

Choose the correct words from the options to complete the sentence correctly: Khalid is ____ taller than Naveed?

A. Not as tall but as
B. As tall, if not
C. As if not
D. As tall as, if not