—Hello! This is travel agency office.—Hello! I'd like to book two tickets for Qing Western Tombs.— .
---How did your students express their thanks to you on Teachers’ Day? ---A gift together with many flowers ______ sent to me.
Only when I left for America ____________ how much I missed my parents.
Tina apologized ______ her mother _________ breaking her favourite necklace.
Making friends is sometimes hard _________ when you don’t know what to say.
They did the experiment in the lab _______ was named after Professor White.