因跑道上有障碍物,导致一架B737在高度30米复飞,构成()。
参考答案:飞行事故征候
Which city is _____ from Beijing, Shanghai, Hangzhou or Nanjing?[ ]
A. far
B. farther
C. farthest
D. the farthest
The No. 15 bus stops here, ______?
A.isn’t it
B.is it
C.doesn’t it
D.does it