Give me a chance, ________ I’ll give you a wonderful surprise.
15. Researchers _______ to develop vaccines and this will probably take several months to complete.
14. Water can absorb and give off a lot of heat, thus ________ a stable environment.
13. He took ________ advantage of cultural resouces and succeeded in ________ 1990s.
12. I'm _______ in studying English words. Don't bother me
11. --- Don’t you know our boss accepted the suggestion _______ by some workers?--- Really? That’s great.