My assumptions rest on two guiding principles.划线处可以替换为？
base on
base in
are based in
are based on
It cost a lot of money. At the same time, I think we shall need it and it will certainly be useful.划线部分可以替换为？
Nevertheless
Instead
Otherwise
Hence
Unemployment among the over forties has risen sharply in recent years.划线部分的意思可以替换为？
clearly
abruptly
bitterly
smartly
The concert was simply wonderful.划线部分可以替换为？
absolutely
merely
straightforwardly
basically
The proposal is subject to approval by the shareholders.划线处的意思可以替换为？
objected to
dependent on
referred to
applied for