—Where are Maria and Kangkang?
—They _____ England and they will be back next month.
A.have been to B. have gone to C. has been in

—Why didn’t you stop them from in the lake? It was too dangerous.
— Sorry, I forgot it.
A. swimming B. swim C. to swim

—_____ the population of the U.S.A. in 2005?
—It _____ about 296 million.
A.What is; is
B. What was; was
C. How many is; was

—It’s reported that many wild animals are _____because of human’s killing.
—That’s too bad. We should do something to protect them.
A. cutting down B. dying out C. taking out

—Have you found your lost book_____?
—No, I haven’t.
A.already B. yet C. just