The headmaster hurried to the concert hall only ___ the speaker ____.
Arriving at a bus stop ______ the vehicle pulling away just a few minutes ago is quite annoying.
It sounds like something is wrong with the car’s engine. _______, we’d better take it to the garage immediately.
I have promised that my daughter _______ get a new electronic dictionary on her next birthday.
Good news! The price of all those second-hand goods is ________ before.
Students in English-speaking countries usually address their man teacher ‘sir”, but __________ their woman teacher “madam”.