题目内容
When you lift some heavy objects, be sure to do enough stretching ______ you run the risk of back injury.
查看答案
搜索结果不匹配？点我反馈
更多问题
Visitors to Wallace Castle are advised to call three days in advance to ______ for the guided tour.
The president expects you to ______ your own judgement when dealing with any matters concerning contract negotiations.
Mr. Prado has been highly ______ for the new position by one of our senior vice presidents.
At the beginning of this year, the company ______ several new policies designed to improve the quality of the products.
微信支付 
支付宝支付