(A) 根据下列句子及所给汉语注释，写出空缺处各单词的正确形式。
Liu Qian is one of the most popular 　　　　(魔术师) in China      .
Let’s go for a walk 　　　　(一起). 
Open the window and let in some 　　　　 (新鲜的) air.
Mr. Li 　　　　(挑选) one of the pens and left quietly.
He can always find many 　　　　(理由) when he is late for school.