21. -Why did you choose Jennifer as the leader of the team?                       

 -No one was equal ______ her ______ skills and experience.

A. to; on         B. with; on       C. with; in       D. to; in

22. My brother bought a telescope, ______ he could study the star in the night sky.

A. of which         B.  through which    C.  in which    D.  on which

23. Mark said that he was unfit for the job, so he decided to _____ from the company.

A. suffer         B. resign         C. retire         D. escape

24. At that time, China was______  Japan, so traveling was extremely difficult.

A. at the war with   B. at war against  C. at war with  D. during the war with