The boy was made to the explanation(解释,说明 process of explaining) .
His parents died in the strong earthquake, so he was ______ in the SOS Village.
Taking care of children calls for your time, abilities, patience and emotions. _____, it is not a simple thing.
All the members of the WTO should follow the ______ of trust and fair(公平) trade.
In our class there are 46 students, ______ half wear glasses.
Tom took a taxi to the airport, only ______ his plane high up in the sky.