You know, when you write, the repetition of he or she is not the problem because some times you have no other option.. you usaully start writing the lecturer then you will use He/She for the rest of the assay.. but what you need to avoid is repeating phrases and words ..try to use different connection words for each point you write...
My advice for the writing section is.....
For the first part in writing,, usually it is a reading passage then a lecture that is opposing the ideas in the reading passage ( they list 3 statements to justify what they are claiming so you have to pay attention and write down these 3 points)
I start like this...( 4 paragraphs, each sentence below is a beginning for a new paragraph, try to leave a line between each paragraph and the one follows so it is easy to read)
The lecturer opposes the reading passage about ............ for three reasons.
First, although the passage states that............., the lecturer thinks that..........
Second, in the passage, ............................. On the other hand, the lecturer,,,,,,,,,,
Finally, .............................................. However, the lecturer claims that..............
You have to notice:
1. Use the same tense (present or past tense, I wrote them above in bold so you can see that I used present tense for the whole time)
2. In the beginning, I stated clearly that the lecturer opposes the passage
3. I mentioned all 3 points used for comparison
4. I tried to use different comparative phrases: however, on the other hand, although...)
5. DON'T mention YOUR opinion or write more information, you HAVE to stick with the information mentioned, not less or more