The young dancers looked so charming in theirbeautiful clothes that we took ____pictures of them

早晨在校门口遇到同学时，应该怎样打招呼

The weekend snowstorm hit the city hard. ______, many primary schools decided to cancel Monday classes.

Jackie is only six years old __________ he can play soccer very well.

The temperature now is much higher than______of 100years ago because of more and more greenhouse gas.