Zheng He had over 300 ships, _______ some were over 150 meters long and could carry up to 1,000 people.
--Why do you choose to work in an international travel agency?---Well, you know, English is my ________. So it is my best choice.
As time went by, the plan stuck ________ fairly practical.
Our manager ________ for Shanghai in a few days and he has asked me to find out when the earliest plane ________ next Wednesday.
Stephen Hawking believes that the earth is unlikely to be the only planet _______ life has developed gradually.
The sleeping baby would be scared _______ a sudden loud noise.