在下列句子中填入适当的单词，使句子完整，词首字母已给出.

OK. Class, please look at the b　　　　.

根据语境写出所缺单词(首字母已给出)

Lucy and Mingming are good f　　 .

根据语境写出所缺单词(首字母已给出)

My son likes computers very much. He's really a computer f　　 .

根据语境写出所缺单词(首字母已给出)

Jimmy is very i　　 in P. E.

根据语境写出所缺单词(首字母已给出)

Tom thinks Chinese is very d　　　　 for him to learn.

根据语境写出所缺单词(首字母已给出)

F　　　　 is very popular in the world.

根据语境写出所缺单词(首字母已给出)

The l　　　　 is the king of the mountain.

根据语境写出所缺单词(首字母已给出)

At last the u　　　　 duck became a beautiful swan.

根据语境写出所缺单词(首字母已给出)

Tony is an i　　　　 boy.

根据语境写出所缺单词(首字母已给出)

S　　　　 is the last day of a week.