—Why didn’t you attend the lecture yesterday?—I didn’t think that we _______ on Sundays.

 But for their common interests, they_____ cooperated so smoothly in the investigation of the case.

Jane’s pale face suggested that she_____ill, and her parents suggested that she________medical examination.

They desired that they __________ the right to attend the meeting.

It is written clearly in the requirements that all passengers _______ check onto board thirty minutes before the plane takes off．