21. Whether a person wants to prepare for employment or _____ additional skills to be more competitive, higher education is the key route to achieving these goals.
A. acquire B. assist C. recycle D. win
22. Such great progress ____ that she was praised by her teacher in class.
A. she makes B. she made C. did she make D. she did make
23. ---- What made you so happy? ---- _______ .
A. Because of my passing the exam B. I passed the exam
C. Because I passed the exam D. My passing the exam
