1.we should try to learn best.(改同义句)。
we should ------- -------- ------- to learn.
2.i received a letter from my parents yesterday.
i ------ ------- my parents yesterday.
3.they didn't go boating.they went swimming instead.
they went swimming ------ ------ boating.
4.she could not go to work because she was ill.
lt was not ------ ------ her to go to work because she was ill.
5 my sister could draw when she was young.
my sister was ----- ----- draw when she was young.
6 we couldn't have a picnic last sunday.because it was rainy.
we couldn't have a picnic last sunday-------- -------- -------- ----------
都是改同义句，会的人帮帮忙啊，赶快帮我做出来，我要交作业的。谢谢乐。