题一：
There are some health problems that, when ______ in time, can become bigger ones later on.
A. not treated B. not being treated C. not to be treated D. not have been treated
题二：
I took my driving license with me on holiday, _________ I wanted to hire a car.
A. in case B. even if C. ever since D. if only
题三：
She says that she’ll h ave to close the shop ________ business improves.
A. if B. unless C. after D. when
_____we have enough evidence, we can’t win the case.
A. Once B . As long as C. Unless D. Since
题五：
_______ small, the company has about 1,000 buyers in over 30 countries.
A. As B. If C. Although D. Once
