12br 12br 10 He fills cavities 11font 11del 10of12del 12font 10 11b 11font 10in12font 12b 10 11font 11del 10his patients12del 12font 10 his patients11font 11b 10'12b 12font 10 teeth. 12br 12br 10(f) He works in his dental clinic. They come to his dental clinic to get treatment.
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01cite10Vincent Teo12cite10(a) The helicopter flies in 11font11del10/ at / on12del12font10 the air.12br
12br
10(b) The doctor is treating the patients.12br
12br
10(c) I walk 11font11del10along1