根据所给单词的首字母, 完成下列句子 （共10小题；每小题1分，满分10分）
【小题1】The boy felt uupset because he didn’t do well in the exam.
【小题2】Don’t let your dog lloose if there are any sheep around.
【小题3】Before the ccurtain(s) went up, the dancers took their places on the stage.
【小题4】The hotline helps many tteenagers who are growing up.
【小题5】After a few days of fever, he began to rrecover .
【小题6】Chinese is the oofficial language of China.
【小题7】I will have to increase my vocabulary (词汇量)
【小题8】He speaks English ffluently , for he has stayed in England for quite a long time.
【小题9】It took four years to plan the voyage （航行）
【小题10】The police soon established his true iidentity and he was quickly found.
网友回答
解析：
【小题1】upset失望，沮丧，形容词形式。
【小题2】loose疏松的，没加束缚的。Let sb. do让某人做，注意用动词原形形式。
【小题3】curtain(s)幕，幕布，可用复数形式。
【小题4】teenagers青少年，注意前面的many，故用复数形式。
【小题5】recover恢复，注意前面的不定式to，故用动词原形形式。
【小题6】official官方的，需要注意用形容词形式。
【小题7】vocabulary词汇量，注意用名词形式。
【小题8】fluently流利地，注意修饰动词，故用副词形式。
【小题9】voyage航行，注意用名词形式。
【小题10】identity身份，这里为名词形式。