完成句子根据各小题A句的意思完成B句, 使两句的意思基本相同。每空限填一个单词。(共12分, 每空1分)
A: The box is so heavy that we can’t carry it.
B: The box is _________ heavy for us _________ carry.
A: English is my favorite subject.
B: I _________ English ________ of all my subjects.
A: Greeting each other with a smile is necessary in our daily life.
B: ________ is necessary ________ greet each other with a smile in our daily life.
A: Lin Hui asked me, “Do you help your parents with the housework?”
B: Lin Hui asked me _________ I_________ my parents with the housework.
A: We must do something to save the wild animals.
B: Something must _________ _________ to save the wild animals.
A: If you don’t read the exam questions carefully, you’ll make some mistakes. 
B: __________ the exam questions carefully, _________ you’ll make some mistakes.