实现和维护劳动者权益是社会主义制度的本质要求。劳动者获得权利、维护权益的基础是: ( )
____ David showed the report to the public surprised me.
—How much do you know about the 3D film technology? —A little. Not until _______ the hot movie Avatar _______ something about it.
— How can I wake up so early? — Set the alarm at 5 o’clock, you’ll make it.
Mr. Smith didn’t understand _____ made his son so upset that evening.
Although cats can not see in complete darkness, their eyes are much more ______ to light than human eyes.