The model car must be ______ before we put it into mass production.

 A. run out     B. tested out     C. found out     D. turned out

用方框中所给的动词短语的正确形式填空。

leave sb alone； turn around；   test out；set aside；    ring up；   smooth away   

1. How many people __________________ while I was out?

2.The model must ____________________ before we put it into mass production.

3.__________________, I saw an old friend of mine, whom I haven’t seen for years.

4.She is very upset. _______________ for a few minutes.

5.It’s time for us _________________ our differences and work together for a common purpose.

6.There are still a few problems to be ___________________ before we can complete the project.