After a heated discussion, we suggested the customer _______ the product back for repairs.

— We expected you yesterday.
— I’m sorry, I        you to say that I couldn’t be here until today.

Among the 15-year-old children, some        studying in university while others are still learning to read and write.

---Mr. Smith, ______ he have all these letters typed for you right away?
---He ______. They should be ready by 10 o’clock this morning.

If only I _____ a few days ago！Then I wouldn’t have been feeling so worried now.

No person __________ carry a mobile phone into the examination room during thenational college Entrance Examinations．

I really don’t know how to thank you , but for your help, I ______ my lost necklace．

It was announced that only when the examination papers were handed in ________to go out of the classroom．

— I haven’t finished my task yet.
— You shouldn’t have watched the film last night, or you _______ it by now.
A, need have finished                       B. may have finished
C. should have finished                    D. will have finished

All the students suggested that they __________ two weeks to prepare for the exam.