Usually children are allowed to ___________ when they are six years old.

While listening carefully,  the students＿＿＿ what their teacher said.

My father told me that he had＿＿＿ hard life in his childhood.

Dennis＿＿＿the warning and put his hand into  the lion’s cage.

＿＿＿your score and you will make sure if you have passed the exam.

In the class of the computer information,  there weren’t enough computers for every student,  so we＿＿＿.

—My spoken English is poor,  what shall I do?
—＿＿＿an English language club to practice,  and you’ll be good at it.

After he retired from office, Rogers ______ painting for a while, but soon lost interest.

This computer doesn’t work properly, because the operating system has         .

We have a high regard for Mr. Black because he always tries to ________ his principles.