请用亮点词汇替换下列句子中的黑体部分。
1．As high school students, we should be neatly dressed when at school.
are_supposed_to
2．The teacher directed the gifted students towards the more difficult courses.
challenging
3．I sincerely hope that you will consider my suggestions.
take_my_suggestions_into_account
4．Our class thought of the idea of how to take advantage of used materials.
came_up_with
5．We should try to improve ourselves through learning and prepare for the future.
take_pains;_get_prepared
6．I want to tell you something about my plan for the summer vacation and I'd like you to help me.
do_me_a_favor/lend_me_a_hand
