. —How’s your tour around the North Lake? Is it beautiful?—It __________ be, but it is now heavily polluted.
_______ is the most useful invention?
______his food______, the man had to come out of his hiding place.
As soon as he comes back, I’ll tell him when and see him.
-----Did you tell Julia about the result? -----Oh, no, I forgot. I her now.
, we decided to spend the night at the foot of the mountain.