—Must I turn off the gas after cooking?—Of course. You can never be ____ careful with that.
You are asked to attend the meeting ______ in the hall this weekend.
When ____ to danger and conflict, men tend to increase blood pressure, ____ nervous or anxious.
in the early 19th century,the school keeps on inspiring children’s love of art.
Every evening after dinner, if not from work, I will spend some time walking my dog.
With the loss of labor,the old farmers ________at home had to choose less labourintensive crops.