They must have finished the work by the end of last month, ______?

This book will show you ________ can be used in other contexts.

Internet is used _________ information for people , but still lots of people are used_________ information from books.

Is Mr. Smith driving here —I’m not sure. He ______ come by subway.

1–Jack’s never worked hardat English, _______ –_______ , so he can’t answer the question inEnglish, I think.