1. All the students are to show their students' cards when they enter the library.
A. required B. allowed C. warned D. proved
2. Helen was so excited at the news that she could say a word.
A. ever B. almost C. hardly D. always
3. Everyone should attend the meeting .
A. in time B. on time C. at times D. by time
4. I haven't got through to Mary. I wonder what has happened to her.
A. So long B. So far C. Before long D. By then
