前几年,洞庭湖、鄱阳湖的鱼类由于当地农民的过度捕捞,致使千里跋涉的鹤雁经受着饥饿的折磨;许多年类,在恶毒的罗网上挣扎,在贪欲的枪声中喋血……造成这种现象主要是基于()
not to miss the flight at 15. 20, the manager set out for the airport in a hurry. (2009 .福建)
twice, the postman refused to deliver our letters unless we chained our dog. (2009 .北京)
Film has a much shorter history, especially when such art forms as music and painting.
The students are forbidden, unless they had special passes,after 11 pm.
, the mountain looks like an elephant.