People cannot but feel _____, for they simply cannot understand how he could have made such a stupid mistake.

________ with so much trouble，we failed to complete the task on time.

With so many people __in English every day, we can see it will be more and more important ___    a good knowledge of English．

The third women’ s conference ______ in the USA this summer talked about women’s rights in the developing countries.

Generally speaking, the publishers will send you a specimen copy of their new books when ________.