Man was, is and always will be trying to improve his living conditions.

The Crimea also released CDs for sale in shops because （）.

There is nothing so admirable as a man whose sacrifices his life and happiness for others. 

The wound soldier made an effort to stand up, but the general stopped him.

Which of the following is the author"s suggestion

What effect has the Internet had on music piracy

Having a conversation with people with dementia will be （）.

No agreement was （） in the discussion as neither side would give way to the other.

Have run out of fuel, the plane crashed to the ground.

It took years for Einstein"s theory to gain acceptably.