(2013·高考新课标全国卷Ⅰ)There’s no way of knowing why one man makes an important discovery________another man，also intelligent，fails

The ice cream is really delicious. Can I have some more—________.

Tom can play _______ football and his sister can play _______ piano.

Smell the flowers before you go tosleep, and you may just______ sweet dreams.

The weather in Beijing is ______ than ______ inNanjing.