I have a new math program, and I want to learn how to use it.
我有一个新的数学程式 我想学习怎样用。
She is at a loss as what to do.
她不知怎么办才好。
The guests had, of course, realized this from the moment Bessie opened the door for them and, long before the final catastrophe, had had a difficult time trying to conceal their amusement.