Great changes ______ in China in the past 20 years.

There is ___ on the table.

Nearly three days after an 8．8-magnitude earthquake, rescuers in Chile were making every effort to _______ possible survivors．

____________ will we give in to the difficultiesWhich of the answers can’t be chosen?

Little Tom got an “A” in the exam.— ___ he’s been so happy these days.