Mr. Black is an experienced engineer , and he will be employed to        us in improving our equipment .

Mr.Smith        an imprtant part when he gave the lecture last Friday .

An interesting suggestion on how to measure the temperature on the moon has been        .

As we all know , bad eating habits and a       of exercise may lead to health problems .

I was grateful to Anna for being open and giving me the opportunity to explain and ______ the misunderstanding between us.

My Dad did not             the idea that I would go camping with my friends this weekend. He said it was dangerous for girls to live outside.

The father stood up in order to protect his 15-year-old son, saying that he was not the one         .

The school should ________ immediately to the students’ request that they should have more time to relax.

The policeman was ________ abusing his power when performing his duty, but it hasn’t been ______ yet.

Only through constant practice can the ability of using a foreign language be _______.