1) While I .... my phone rang. a) was sleeping b) slept 2) I was going to school when I ... a) was slipping b) slipped 3) He fell down the stairs while he .... a) climbed b) was climbing 4) I was cooking ... my best friend phoned me. a) when b) while 5) I was doing my homework ... my brother was watching TV a) when b) while 6) Ben was watching TV ... Bob arrived. a) when b) while 7) I was riding my bike ... my brother was skateboarding. a) when b) while 8) When John ... I was cleaning my room. a) arrived b) was arriving

Unit 4B Basic 3

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ตัวเลือก

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