While building a tunnel through the mountain, ______ ．
A. an underground lake was discovered
B. there was an underground lake discovered
C. the workers discovered an underground lake
D. a lake was discovered underground
Much to our disappointment, things are not going so well as _______.
A. planned B. planning C. plans D. to plan
I’ll never forget such a beautiful place _____ I spent my childhood there with my grandma.
A. that B. although C. where D. because
—Do you know the tower ___ in the heart of the city?
—Do you mean the one ___ to the north of the city library?
A．locating; lay B．located; lying
C．being located; lying D．located; lay
—Do you know ____ the 2011 Xiamen International Marathon was held?
—On January 2．
A．when it was that B．when was it that
C．what it was that D．what was it that
Scientists across the world agree that this is an invention of ____ great significance, ____ invention that will greatly change human life.
A. a; the B. a; an C. / ; the D. / ; an
