1) I .................... when the door opened a) were studying b) was studying c) studied 2) when the man came they ............. a) was playing b) studied c) were playing 3) I was eating lunch when the telephone.......... a) ringing b) rang c) ring 4) The girl was crying when the teacher................... her a) calling b) call c) called 5) the man was carrying a box when a car accident .................... a) happen b) happening c) happened

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