I’m sure that if you make good use of your ____ time, your English will be improved in a short time.

--- Mum, what are you doing? ---Your uncle will come; I put a(an) ________ plate on the dinning table.

We waited for the books he bought for us in             day and night.

Dan caught two ________birds in the wood last week and they are still ________in the cage.

---Is Medicine a science?　  ---Well, nowadays, most doctors recognize that medicine is ____ it is a science.