We found it difficult _______ there on time.
Many social workers went to Ya’an to help________clean water and food to local people to reduce their pain from the earthquake.
—Why are you walking so quickly,Edward?—There________a talent show in ten minutes.
There________great changes in our hometown in twenty years.
—Do you know________tomorrow?—David?Never!He hates outdoor activities.
—Your T-shirt is so cool.Could you tell me________?—I bought it at the department store.