Mr. and Mrs. Scott prefer a trip in a small town to in so large a city as New York．
| A．this | B．one | C．it | D．that |
--- Well, Linda, I’m sorry but I have to leave.
--- _______. I hope to hear from you soon.
| A．So am I | B．Enjoy yourself | C．Don’t be so sad | D．Keep in touch |
15. Researchers _______ to develop vaccines and this will probably take several months to complete.
| A．are working | B．worked | C．will work | D．has worked |
14. Water can absorb and give off a lot of heat, thus ________ a stable environment.
| A．creating | B．to creat | C．created | D．being created |
13. He took ________ advantage of cultural resouces and succeeded in ________ 1990s.
| A．an ; / | B．the ; the | C．an ; the | D．/ ; the |
12. I'm _______ in studying English words. Don't bother me
| A．absorbing | B．absorbed | C．to absorb | D．being absorbed |