..--- How’s your tour around the North Lake? Is it beautiful? --- It ________ be, but it is now heavily polluted (污染).
30. Is this the girl______ whom I can turn for help? Is she good at this subject?
28._______ our food running out, we had to walk to a village for help.
28. It was __________________ back home from work.
27. — Didn’t you enjoy the performance last night? — ___________. It was less wonderful than expected.
26. It was ______ that they all went swimming in the river.