China recently tightened its waters controls near the Huangyan Island to prevent Chinese fishing boats from __________ in the South China Sea.
Computers can do a lot of things nowadays, but _____ more still need to be done by man.
Lectures were _____ so students could be more focused on their study for the finals.
He _____ on the bench, with his head down and his eyes _____ on the ground.
Every year, millions of people visit the Palace Museum, and many of __ are foreigners.
—We really enjoyed ourselves at the party. Thanks again, Mr. and Mrs. White. —_____. Just drop in whenever you feel like it.