Most whales must come up for air after several minutes, _______ a few can stay under water for an hour or more.
The womanthere, in a blue shirt, is Lily’s teacher.
_______ I went to the South Lake in Hanzhong, I was deeply impressed with its beautiful scenery.
Sheldon could have defeated Howard in the match, but he _______ too careless at the last minute.
Don’t call me up at this time tomorrow, for I _______ an important test.
It’s the third time that Li Ming has been to Xi’an , _______?