____four years since I joined the army.
The cars in the auto show vary ______ price from $ 100,000 ______ $ 2 million, but they have attracted many customers.
I was told that although these old buildings _______ the Qing Dynasty, they remained in good condition.
It was Alice and her friends who helped the homeless old woman,______?
He felt _______ to remind the public to protect the environment.
The research they had been devoted to ______ to be of great value to the cancer patients.