21.
The fort was surrounded by . . . . . . . . enemy soldiers.

22.
We were invited to . . . . . . . . dinner . . . . . . . . day before yesterday.

23.
If you see him, give him . . . . . . . . message.

24.
Plants gain energy from the light of . . . . . . . . sun.

25.
It is not known whether . . . . . . . . high blood pressure is due to . . . . . . . . increased sodium intake.

26.
One of our biggest social problems is . . . . . . . . unemployment.

27.
On . . . . . . . . first day, they stopped at . . . . . . . . river and decided to make . . . . . . . . camp.

28.
People admire . . . . . . . . scenery of Kashmir.

29.
Today I saw . . . . . . . . European in a temple.

30.
Don't stay outside in . . . . . . . . cold; come in by . . . . . . . . fire.