4 Bob was interested/interesting in maths. 5 He always talks slow/slowly. 6 He'll call when he arrives/will arrive. 7 He didn't use/used to wake up early. 8 Let's go before he comes/will come. 9 She could/was able to do the exercises in30 minutes. 10 Did people used/use to send letters 50 yearsago?Points:10 V110