英语句子练习,快一点,O(∩_∩)O谢谢

这个题目出错了.mustn't只表示“禁止”、“不允许”,语气强烈.Youmustn't do well in the exam意思是“你不准在考试中表现良好”,这怎么可能呢?
应改成：
Study hard,or you won't do well in the exam.
=Study hard,and you will do well in the exam.
这两个句子的共同点是：前一分句是祈使句,后一分句是表示结果的分句.这种结构的两个子分句中间一定要用一个并列连词.
Last Saturday I walked in the zoo with my uncle.l w--------many animals.They come from many countries in the west.My uncle k------many animals in the zoo.Everyday he feed animals food.Now let me introduce some animals to you.Koalas come from Australia.They' re w------to watch.Dolphins are very lovely and clever.They live in the water.They can dance well with m------.They m-----people excited.

or you

or you首字母： Last Saturday I w-----in the zoo with my uncle.l w-----many animals.They come from many countries in the w-----.My uncle k----many animals in the zoo.Everyday he feed animals food.Now let ...

=Study hard,or you mustn't do well in the exam.

or you or:不然，否则
努力学习，不然你考试不会考得好。