1. we worked hard before christmas we could really enjoy the holiday a. to b. so that a. to c, in order to 2. take you house keys in case a. have gone b. will go out when you come back. c. went 3, this bracelet is sarah. it's her birthday tomorrow! a. to b, in order to c, for 4. i have come here help you a, to b. so that c. in order to 5. concentrate on your exercise make any mistake. a. not to b, so that a, not to c. so as not to 6. she left work early be at home when he arrived a. to b, so as not to a. to c, so that 7. i will go to university continue my studies. a. in order not to b. to c, so that 8, she works hard she can earn a living. a. so that b. in order not to c. so as to 9. i'm studying very hard at the moment pass my exams next month a. so as not to b, for c. to 10. they took the taxi waste time. a. to b. so as not to c. in order to