20. ________of both sides, the two companies decided to _______ to become more competitive in the global market.
This is not an economical way to get more water; _________,it is very expensive.
After her son’s death, the old lady __________ sit at the window, deep in thought.
The beautiful stone _________ as much as 2.5 tons was placed in Mr. White’s garden last week.
--- I didn’t believe you made such a mistake. ---Oh, I’m sorry. I did it ___________. I’m serious.
He lifted the receiver as soon as the telephone rang but it on the table at once. A. lay B .lied C laid D lain