根据句意，写出括号内所给单词的适当形式。
小题1:We all know there are lots of ______ (advantage) of living on Mars, so we won’t move out of Earth to Mars.
小题2:______ (hope), we can finish the project before this weekend.
小题3:Do you think it’s good for them to keep worries which were caused by others to _____ (they), guys?
小题4:The ______ (strict) the parents are, the more stressed their children will become.
