Not only John and Tom but also their sister, Mary, ______great interest in the piano lessons. 

People like to eat sweet dumplings on the Eastern Festival，which ____ in hot water．

 --- Liu Yi, do you miss your parents? I hear that you go back home once every month. ---Of course. You know this is the first time I_____ in the dormitory at school, far away from my hometown, Luoyang. 

When the American constitution ______into effect in 1789,it didn’t contain any words guaranteeing the basic rights of ordinary citizens.

Many air flights _________because of the eruption of the volcano, in _______case, many passengers had no choice but to take a train.