C- Write the correct form of the verbs!            1-     I _______________(study) History when my friends__________________ (come) around. 2-     While Susan_______________(walk) in the street, she ____________(meet)   an old friend. 3-     Her baby_________________ (wake) up while she __________________(clean) the house. 4-     He __________________ (work) when her wife _______________________(phone) him. 5-     The students ______________(have) a test when the storm ____________(start). 6-     We ______________(see) a fallin irg star while we ________________(go) fishing in the lake. 7-     Susan______________(fall) down while she ___________________(climb) the ladder. 8-     I ___________________(walk) along the road when I_____________(see) you with her. 9-     Tom _______________(burn)his hand while he _________________(cook)the dinner.​