Mới người giúp e với ạ, e đang cần gấp , làm hết từ câu 11-35 ạ

11. The teacher gave us too many assignments, that we (can not). earn money to pay his tuition. 12.He works on sundays so that he (can).... 13.1 (be).......... busy since we last met. 14. I'm very fond of Jane but I (not see)..........much of her lately. 15.I never (see)...........anyo ...