1.
I am sure he was thirty when I first met him.
(must)
2.
3.
4.
Some students found it difficult to solve the problem.
[difficultの名詞形]
(神戸市外語大)
That person is of no particular importance.
[important)
(九州産業大 )
6.
As soon as he caught sight of me, he avoided me.
(no sooner... than)
(慶大)
That old umbrella isn't yours, is it?
5.
7.
(埼玉大)
(神戸商大)
My success is due to you. [owe)
Labour is not only a necessity but also a pleasure.
(as well as]
(工学院大)
8.
[belong]
(東京商船大)
The problem was too difficult for anyone to solve.
(so ... that]
(京都教大)
9.
He was kind enough to show me the way to the station.
(関東学院大)
10.
(kindness)
Though she is a woman, she is very stout-hearted.
[as]
(神戸市外語大)