小题1:C
小题2:B
小题3:B
小题4:A
小题5:A

小题1:abroad [ə]   故选 C
A. altitude[æ]         B. ancient [eɪ]          C. balloon  [ə]             D. behalf [ɑː]
小题2: accept [e]   故选B
A. absent  [ə]         B. address [e]           C. appreciate [iː]            D. between[i]
小题3:character [k]  故选B
A. charge  [tʃ]         B. chemical  [k]       C. church  [tʃ]            D. branch [tʃ] 
小题4:. already [e]   故选 A
A. breath  [e]         B. beneath [iː]          C. beat  [iː]               D. breathe[iː]
小题5:center  [s]  故选  A
A. accident [s]         B. basic [k]         C. carpet  [k]            D. camera [k]