Consider the following premises. If it rains, then Sarah is working. Sarah is reading a book. For all y, if y reads a book, then y is working. Can we infer the following from them? Sarah is working.
 From the fact that for all y, if y reads a book, then y is working we can infer that if Sarah reads a book, then Sarah is working. From the fact that Sarah is reading a book we can infer that Sarah is reading a book or it is raining. Finally, from the fact that if Sarah reads a book, then Sarah is working, that if it rains, then Sarah is working, and that Sarah is reading a book or it is raining we can infer that Sarah is working. Therefore, the answer is yes.