I hurried back home only ________ that I had left my key at my office.

We’re so much looking forward ____________ you again.

Song Zuying became the first Chinese singer _______ a solo concert at the Vienna Golden Hall , ______ an audience of more than 1,000.

_____ by the advances in technology, many farmers have set up wind farms on their land.

_____in a well—known university is what everybody wishes for.