—Your flight was quite late last night.—Yes, it was midnight __________ our plane finally got to Jinan.
The student corrected his paper carefully, _______ the professor's suggestions.
He went from door to door, _______ waste papers and magazines.
. _______ the office, the foreign visitors were shown round the teaching building.
With winter _______ on, it's time to buy warm clothes.
Deeply _______, I thanked her again and again.