【单选题】
Of course, talking about something which affects them personally is _____motivating for students.
【单选题】
The elbows on your coat have worn thin, so I must _____them.
【单选题】
It is from the earliest times ______ men have studied the world around them with interest.
【单选题】
A camera takes light rays bounced off objects and____ them
on a sheet of a film.
【单选题】
Mac’s close ____ to his brother made people mistake them for one another.
【单选题】
But the Swiss discovered long years ago that
constant warfare brought them ____suffering and
poverty.
【单选题】
15.It was on the day my first son was born _____ I put them in the soil.
【单选题】
9. Outside, the ______ children were lying naked in the sun with nobody attending to them.
【单选题】
7.We could see he felt ______ as he pointed and laughed at them.
【单选题】
He is a man who always makes his promises [] who never keeps them.