Answer:
b) What has your father bought you for your birthday?
c) Have you seen it?
d) I haven't noticed it yet.
e) Have you seen this movie many times?
f) Sarita hasn't done a course on computer programming.
g) She has agreed to help me with computer programming.
h) Have you not visited the zoo?
i) Prabhakar hasn't been in touch with George.
j) He has read a lot of Shakespeare.