—I hear you have an experience in the Royal Air Force. Is that ture?—Yes. I ______ in the Royal Air Force for six years. A. served B had served C joined D have joined
This kind of music is not _____. Only a few people enjoy it.
---Can you possibly lend me fifty dollars until pay day? ---______. Do you think I was born with a silver spoon in my mouth?
____ that saw the trade between the two countries reach its highest point.
The man, ____ is parked in front of our school, is a well-known politician.
---Is Medicine a science? ---Well, nowadays, most doctors recognize that medicine is ____ it is a science.