TOEFL Grammar - Choose the right word

ScottsEnglishScottsEnglish Administrator Posts: 1,296 admin ✭✭✭✭✭✭✭
edited August 2016 in TOEFL Test

Choose the right word for the following sentence:

The experiment must be repeated by a different laboratory ________________ the results are reproducible and thus viable.

A. so that
B. make sure
C. to ensure that
D. in order to


The experiment must be repeated by a different laboratory to ensure that the results are reproducible and thus viable.

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