Complete the following paragraph by choosing the correct words from the options given below :
When the old lady (a) ............... to her flat she saw at once that the burglars (b) ............... in her absence. Though the burglars themselves (c) ............... no longer there but she saw that they (d) ............... because there was a burning ***** in the ashtray.
(a) (i) return (ii) returning (iii) returned (iv) had returned
(b) (i) break (ii) broke (iii) had broken (iv) were breaking
(c) (i) be (ii) were (iii) was (iv) are
(d) (i) just leave (ii) just leaving (iii) are just leaving (iv) had just left
