The public transport system in Beijing is very good now, so there _____be any difficulty in traveling around the city.
With the successful launch of Tiangong-l, which was _____ breakthrough in space field,China's space dream took a step closer to _____ reality.
He is sure to ________ with the help of Mrs. Li.
Every year he ________ to Beijing to visit his teacher.
The last bus has left; ________, you’ll have to walk there.
He ran ________ fast that I couldn’t catch up with him.