As we all know，life is a long________full of happiness as well as hardships.

－Where does your uncle work, Jack?－In a ________ in Paris. He is a policeman.

The plan was that the two parties should first reach an agreement on the basic ________,the details to be worked but later.

Teachers have to constantly update their knowledge in order to maintain their professional(专业的)_______.

Always remember put such dangerous things as knives out of children’s