1.Tina didn't visit the Exhibition on Shanghai's and Present

1.Tina didn't visit the Exhibition on Shanghai's and Present______she was ill.
a,before b,though c,because d,until
2.The ____Jin Mao Building is a symbol of shanghai.
a,420-metre high b,420 metres high c,420-metre-high d,420-metres-high
3.The milk is too hot for me to drink.(保持句意）
The milk is ____ hot that ____ _____ drink it.