I will never know ________ whether I was encouraging or discouraging my children's interest in technical work by my example.
A．in detail B．for fear
C．for sure D．in place
I will never know ________ whether I was encouraging or discouraging my children's interest in technical work by my example.
A．in detail B．for fear
C．for sure D．in place
C [句意：我永远不能肯定地知道，自身的例子对孩子们在科技方面的兴趣是起了鼓励作用还是反作用。for sure“肯定地，确切地”。in detail“详细地”；for fear“唯恐，以免”；in place“适当地”。]