Where are you going for your summer holiday— We ________ go to Yun Nan, but we haven’t decided yet.

Finding the ______look on the student’ s face, the professor felt _____about his explanation.

It was the training _______ he had at school _______made him good jumper．

, I lost heart in English learning, but my teacher often said to me, “Keep on studying hard ,and you’ll succeed .”[ ]

对加点的词的解释，正确的一项( )