Most children need encouragement in time of failure ______ they can cheer up again.

The school rules state that no child shall be allowed out of the school during the day, _____ accompanied by an adult[ ]

Mother returned home _____earlier than Father that evening.

The year 2008is a special year, _ I think, that will be remembered by the Chinese forever.

.We were all waiting for you .You _____for the seaside by yourself without leaving a message.