The difference in thickness and weight from the earlier version makes the iPad 2 more comfortable __________.
--- How did you pay the workers? --- As a rule, they were paid ______.
. Several years later he ___ writer.
__ U.S.A. lies on the other side of ___. A. The; PacificB. /; PacificC. The; the Pacific D. /; the Pacific
Beyond ___ stars, the astronauts could see nothing but _____space.
He is ___new comer to ___ chemistry but he has made a few important discoveries.