----She must have gone back to the valley. ----No, she _____. The entrance to it was nowhere to be found. A mustn’t B needn’t C couldn’t D hadn’t
The new bridge is ______ the one built last year.
You can’t imagine this lake used to be a beautiful place in our province .
With a lot of problems _______, the principal decided to hold a meeting to have a discussion about them
He made up his mind to devote his life _____ pollution ______happily.
—What did your parents think about your decision?—They always let me do _____ I think I should.