37. I tried all I could do ______ the topic at the meeting, but failed.
The patient was warned __________ oily food after the operation.
Hearing the news, he ran out of the room in a hurry,__________ the door __________.
The drug did not __________ his health. In fact, it seemed to have no __________ at all.
A lot of __________ passengers were sent to hospital immediately when the rescue team arrived.
I __________ a few words of Greek when I was there last year.