1. Exercise 21

2. No.1  (Worse) State universities are as competitive, if not more competitive than, private ones.  (Better) State universities are as competitive as, if not more competitive than, private ones.

3. No.2  (Worse) A GA-based procedure is proposed solving the MCG problem.  (Better 1) A GA-based procedure is proposed for solving the MCG problem.  (Better 2) A GA-based procedure is proposed to solve the MCG problem.

4. No.3  (Worse) During an earthquake, high rise apartment buildings are as safe, if not safer than, conventional housing.  (Better) During an earthquake, high rise apartment buildings are as safe as, if not safer than, conventional housing.

5. No.4  (Worse) Smith et al. (1) more thoroughly investigated the physical phenomenon.  (Better) Smith et al. (1) more thoroughly investigated the physical phenomenon than other researchers.

6. No.5  (Worse) The new curriculum emphasizes more practice than the old one.  (Better) The new curriculum emphasizes practice more than the old one does.

7. No.6  (Worse) The enrollment at university is as high, if not higher than, at the institute.  (Better) The enrollment at university is as high as, if not higher than, at the institute.

8. No.7  (Worse) CM strive attain the benefits of a product-oriented layout.  (Better) CM strive to attain the benefits of a product-oriented layout.

9. No.8  (Worse) The temperature ’ s decrease is slower than the height.  (Better) The temperature ’ s decrease is slower than that of the height.

10. No.9  (Worse) Kaiser et al. (5) more thoroughly described the fusion reaction.  (Better) Kaiser et al. (5) more thoroughly described the fusion reaction than other researchers.

11. No.10  (Worse) I respect the teacher more than him.  (Better 1) I respect the teacher more than he does.  (Better 2) I respect the teacher more than I admire him.

12. No.11  (Worse) The CF method is as reliable, if not more reliable than, THI method.  (Better) The CF method is as reliable as, if not more reliable than, THI method.

13. No.12  (Worse) C&C analysis is only appropriate for parts than easily recognized.  (Better) C&C analysis is only appropriate for parts than are easily recognized.