Choose the correct structure of this sentence “He gave Laura a present.”

By the time you come back, your aunt ______ for Nanjing to attend a meeting.

Can you describe _____ it happened?　　　　—Yes, I was riding on my bike _____ a car knocked me down from behind

I read some goodbooks than watch a bad TV program.

__ I do not know what I ___________ without the suitcase you lent me. __ Glad to have been of some help to you.