David apologized for ________ to inform me of the change in the plan.
Rather than at home alone, Little Tom go to the cinema that day.
More and more foreign students come to China to learn________ Chinese language.
In order to catch up with her classmates, _____.
—Do remember to watch out for cars while crossing the street. —_____.
—_____ that he picked up his uncle at the airport? —It was at 6:00 in the afternoon _____ he got off work.