What _____ to Joan last night? What did she cry for?

It is the most instructive lecture that I______ since I came to this school.[ ]

During China’s Golden Week, the first week of October, 650 million domestic tips were made in the country. The number of visitors to domestic travel destination was _____ of last year.

.Although it seemed to be _______ painful experience, he still found it_______ fun.

________ here yesterday, he would attend the lecture with us today. [ ]