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energy: the sun, the sea, the wind, and hot springs.
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M compose certainty
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When he got upstairs, John was very tired and ! himself on a
couch.
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1.
It is important to understand the powerful economic and social forces
at
1 work behind our actions.
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3 at at
2.
I in This law has been existence since the end of the 1950s.
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3 in in
3.
I on
How long a suit like this should last depends 1 how often you
wear it.
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J on on
4.
Bad workmanship and inferior materials are responsible
I for
the collapse of the bridge on the river.
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5.
1 on
Well have to sleep 1 your invitation until we know whether
we will be free on Monday night.
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3 on on
6.
1 between
The book presents a very interesting contrast 1 life now and
life a hundred years ago.
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between
3 between
7.
I for
Scientists are still searching I an effective and inexpensive
cure to the common cold.
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3 for for
8.
The general manager has no time to see you at the moment; he is occupied
I with
1 solving some urgent problems.
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kJ with with
9.
1 at
After three weeks of observation, we arrived 1 the
conclusion that Shelly is capable of conducting the experiment.
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3 at at
10.
I Of
Are your opinions representative 1 those of the other
students in your class?
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3 of of
11.
Nineteenth century life in the United States is exemplified
1 in
the novel The Adventure of Tom Sawyer.
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