—How’s your tour around the North Lake? Is it beautiful?—It _______ be, but it is now heavily polluted.
The work was difficult, but Tom’s ____expression showed that he would finish it in time.
Tim’s house in NY is much smaller than ours, but it's three times ______ expensive.
They are talking excitedly about the writers and their books ________ interest them.
My English teacher insisted that the exercises ____very difficult and that we ____them carefully.
Last night I came across the man ____ you think is pleasant to ________.