几道英语选择题,分析原因

题目

几道英语选择题,分析原因
1、It's_____ to plant trees on the hill
A a hard work B hard work C work hard D difficult works
2、____ our duty ____ the wild animals in danger
A That's;to protect B It's; to protect
C This is; to protect D That's; protecting
3、The doctor told him to eat the medicine____the right time
A、on B in C at D for
4\If you can't decide which of the two novels to borrow,why don't you take_____
I won't read them this month
A both B all C any D either

答案

1.Bwork是不可数名词,所以排除AD,work hard是动词短语,不能作宾语,排除.2.BIt's + n + to do是固定句型.3.Cat this time这一次at that time那一次at the moment那一刻,这一刻所以用at.4.A如果你不能决定选两本中的哪...