1) I was having lunch _____ James arrived. a) when b) while 2) _____ the doorbell rang, I was opening the door  a) When b) While 3) ____ John was singing, I was doing my homework. a) When b) While 4) _____I was making dinner you were setting the table a) When b) While 5) I was buying at the bakery ____ two cars crashed a) when b) while 6) The salesman was helping the customer ____ the thief came into the store. a) when b) while 7) ____ I went to the gym you were having a call conference. That's why I didn't tell you a) When b) While 8) I was looking for a pair of shoes in the store _____ someone stole my bag. a) when b) while 9) I hurt my back ____ I was trying to lift the piano. a) when b) while 10) ____ we were waiting the uber outside the cinema, my cellphone turned off a) When b) While 11) _____ Mrs Scott came back to her hotel, her sister was waiting for her at the elevator a) When b) While 12) I was working out ____ I started to feel dizy a) while b) when 13) Sally was playing around the garden ____ her mother was talking on the phone a) while b) when 14) My mom was squeezing lemons ____ I was cutting the lettuce a) while b) when 15) Someone called me ____ I was reading a book a) while b) when 16) ____ my brohter was watching formula 1 I was watching the Chicago Bull's game a) While b) When 17) Vale called me last night ____ I was having an English class  a) while b) when 18) Yesterday ____ I was sleeping you were having dinner with your friends  a) while b) when  19) My parents were travelling to Argentina ____ I was going to the gym a) while b) when 20) I was having a bath ____ it started to shake a) while b) when

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