It is the test system, _______ the teachers, that is to blame for the heavy burden of middle school students nowadays.
Having completed our adventurous journey through the forest, we went back to our camping site, _______.
Paper bags produced every year are ______ the world’s production of vehicles.
After the disaster, the first thing the local government did was to provide _____for the homeless families.
— Her father is very rich. —________ She wouldn’t accept his help even if it were offered.
—Come on,Kitty. —Oh, good heavens! Both my legs are nearly to give out. I_______ for hours like a dog.