人教课标  高二 选修 7
Unit 5
Unit 5 Travelling abroad
Language points
KEEP IT UP, XIE LEI.  keep it up 保持优异成绩；继续干下去  keep up 保持；继续  keep up one’s morale / one’s spirits / appearance   保持士气/振作起来/装门面  keep up with sb./sth. 与……保持联络；跟上，不落在后面  keep sb. up 使某人熬夜