Air pollution results in stronger greenhouse effect, which __________ leads to global warming. We must take measures to prevent pollution before it is too late.

The actor________us greatly with his wonderful performance and excellent English. [ ]

依次填出下面一段文字横线处的语句，衔接最恰当的一组是（ ）真理和谬误又是统一的，即二者相互依存、互为前提 ； 。 。 ， ， 。①没有真理，就无所谓谬误。②它只是在一定范围内才是真理③这是因为，任何真理都受到一定范围的限制④如果超出了这个范围，就会变成谬误⑤真理和谬误在一定条件下又互为转化⑥没有谬误，也显不出真理

My sister is on holiday in Hainan. —I wonder ____.

The helicopter soon arrived at the scene of the accident to _______ the survivors.