You can either sing ______ dance ______ weekends.

Please keep______ secret that he’ s decided to give up his present position.

Will there be more people in thefuture — No, ________. There will be fewerpeople.

The hotel wasn’t particularly good，but I ________ in many worse hotels.

. If plants from one habit were moved tothe other type of habit, they changed their appearance and _____ the newenvironment.