-–Mary knows the city quite well.
--She______ well have been there before.
A. need B. could C. should D. may
The past two years ______a sharp rise in oil price, which adds to the burden of auto transportation industry.
A. has witnessed B. witnessed C. is witnessing D. witnesses
The moment ______Leo will never forget is ______he joined the Air Force
A. when; that B. that; that C. that; when D. when; /
I prefer to work here because salaries are higher here than ______in my country.
A. that B. the ones C. those D. one
The girl ___on the ground ___to me that she had ____the book on the shelf.
A. lying; lay; laid B. lay; lied; laid
C. lying; lied; laid D. lie; lied; lay
______himself to his research on the IT technology, he soon made a breakthrough.
A. Devoted B. Devoting C. Devote D. To devote
