..--- How’s your tour around the North Lake? Is it beautiful? --- It ________ be, but it is now heavily polluted (污染).
The twins were so much alike; I could hardly ________ Tom.
—I’m sorry. I ________ at you the other day. — Forget it. I was a bit out of control myself.
________ he finished writing his paper in such a short time surprised us all.
The man ________ as “a crazy guy” is actually the boss of our company.
________ his help, I finally caught up with my classmates.