题目内容

___________you want some samples of our new products, you might contact our sales manager.（2019年12月第23题）

A. If
B. While
C. Until
D. Although

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He read my credit card number out loud in front of customers __________I could stop him.（2019年12月第28题）

A. before
B. while
C. as
D. since

You will not be able to improve your work_____________ you are aware of your shortcomings.（2019年6月第22题）

A. if
B. unless
C. when
D. since

_______________we are living in the big data era, we are able to collect and analyze as much patient in - formation as possible. （2019年6月第29题）

A. Even though
B. As if
C. In that
D. Now that

Ithas been quite some time since we_________________you at your office in Beljing（2019年6月第30题）

A. visit
B. visited
C. havevisited
D. hadvisited