听录音，选出你所听到的单词。（每小题读两遍10分）
（1）A. backache      B. headache       C. toothache
（2）A. subject       B. Science        C. studies
（3）A. feel          B. fever          C. fast 
（4）A sing loudly   B sit quietly     C. listen carefully
（5）A. Thursday      B. Tuesday       C. thirsty