2.他宣称他是正确的.(declare)

He declared that he was right.

3.鼓起勇气,成功就属于你.(keep up)

Keep up your courage, and success will be yours.

4.他虽然不会说话,但能通过手势让别人知道他的意思.(by means of)

He couldn't speak, but made himself understood by means of signs.

Step 5 Homework Review the language points.