The police always take ________ of dogs’ sharp sense of smell to search for the survivors in the earthquake.
The man pulled out a gold watch, ______ were made of small diamonds.
Though I am improving in my study, I still have a long way to go _____some of my classmates.
No one hopes the two countries will be at ________ war, because ______ peace is what everyone wants.
---- Hello, John. I haven’t seen you since we were at university. ---- ________. It’s been a long time.
I have kept that photo ______ I can see it every day, as it always reminds me of the happy days in New York.