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1 Sam (0) was writing on the classboard . He (1) ........... what his classmates(2) ....... at what time.
2 While Pete (3) ........ , John (4) ...... him.
3 While Sue (5)........ , she (6)........ .
4 Bill (7) ...... to Tom. Tom (8) ...... and he (9) ....... Bill.
5 Helen and Laura (10)....... .