Turn the following active verbs into the passive;
a. We are writing the short story for the literature class.
b. The zoo keeper and the vet kept the tiger in a separate cage until its wound healed.
c. We must follow the right trail to reach the peak of the mountain.
d. Have you ever bought strawerries in winter?
e. Tom hadn't booked the hotel before we left, so his cousin provided accommodation for us.