---How’s your tour around the North Lake? Is it beautiful? ---It ________ be, but it is now heavily polluted.
Mr. Benet is such a wise teacher. Never have I regrettedthe advice he gave me.
The beautiful mountain villagewe spent our holiday last year is located in____________is now part of Hefei.
Dave is always , never making a decision about anything in a hurry.
Reasonable analysis as well as imagination isscientific discoveries.
-----I think you us an explanation. -----I will prove what I have done is right and I mean no harm.