______the doors were closed and that all the lights were off, the boy left the classroom.
—What do you think of the man you have just interviewed? —He gave me a(an) ___ that he was not very ___ about the job.
I’ve always been very ___ about giving my address and telephone number to strangers.
I waved to Nancy, but she was ___ in her thoughts, and made no response.
I have tried to solve the problem, but it is so difficult that it ___ not only me but also my friend.
John Snow became inspired when he thought about helping ordinary people ___ Cholera.