. Deer____ mainly on grass.
15. After retiring, he was recommended to ____ gardening as a hobby.
14. --I tried many times, but I still failed in the experiment. --Don’t be discouraged. ____ and the problem will be settled.
13. --Hi, Lydia. Are you going to the concert on Friday? - -I’d like to. But there are so many problems ____.
12. So little ____ about science that the lecture was ____ my understanding.
11. Information has been put forward ____ more measures will be taken to solve the economic problems.