【判断题】The ill and physically unable people can remain seated when being introduced.()
【单选题】No matter how bright a talker you are, there are times when it's better ________ silent. [ ]
【单选题】Some people prefer to remain anonymous when they call the police to report a crime.
【单选题】It is required that passengers remain ________ when the plane is taking off or landing.
【单选题】When and where the new hospital will be built______ a mystery. [
B.
] remains [ C] remain [ D ] isremaining
【单选题】It is not easy to remain tranquil when events suddenly change your life.
【单选题】When and where the new hospital will be built _____a mystery.
【简答题】When trapped in a burning building, survivors can remain calm and ______to find out where to escape for life.