Chinese students are good at taking exams and you can’t imagine what they are willing to to succeed.
More consumers are waiting for the further drop of housing prices with money in their hands rather than ______ houses, according to a report.
Nobody believed his reason for being absent from the class __________he had to meet his uncle at the airport.
Shall we go ____ downtown to buy some clothes of high quality?
____ we are alone, we can speak freely.
The chairman thought ____ necessary to invite Professor Smith to speak at the meeting.