．—I wonder whether the speaker has arrived.— ________ ，I’ll check at the reception desk.

How did you manage to get to the school on time_________you missed the school bus?            

________my dear teacher couldn’t understand was ________ fewer and fewer middle school students showed interest in her lessons.

 He was impolite to the Custom Officer, ____, of course, made things even worse.

In the current situation, ___________ the dollar goes above 1.85 reais, investors sell the greenback to take some profit.