9. I'd like to suggest a four-year contract.
我建議簽一份為期四年的合同。
還能這樣說：
I advise to sign a four-year contract.
I sugest that the contract should be signed for four years.
諺語：
A man without money is no man at all.
一分錢難倒英雄漢。

10. You shouldn't make a contract until you have studied its provisions carefully.
你應該先仔細研究合同的條款，然后再簽訂。
還能這樣說：
You can sign the contract once you make a research into the items carefully.
You must make a close study on the provisions prior to signing the contract.
應用解析：
make provision for 為……做好準備，為……預先采取措施；
run out of provisions 缺少糧食（或其他供應品）

11. We are fully satisfied with the terms of this contract.
我們非常滿意這份合同的條款。
還能這樣說：
We are pleased with the provisions in the contract.
The provisions in the contract satisfy us pleasantly.
應用解析：
in terms of 從……方面，從……角度來講；換算，折合；
in the long term 從長遠觀點來看

12. We'd like to make the contract to be valid for two years.
我們把合約的期限定為兩年。
還能這樣說：
We would like to sign a two-year contract.
We want the contract to be firmed for two years.