I really don’t want to go to the Party, but I don’t see how I can  it.

It takes more than knowledge and intelligence to ______ a good researcher．

 Eating too much fat can ______ heart disease and cause high blood pressure.

The boy’s father insisted that the boy ______ badly and that he ______ to the nearest hospital at once.

Low-carbon lifestyle is of great benefit to improve the world environment, but the problem is difficult to _________．