The director was uncertain __ the team would be able ...

[ Grammar for TOEFL ]

The director was uncertain __ the team would be able to complete the project before the deadline, considering the unexpected challenges they faced during the development phase.*

A. why the team was so determined to push forward,

B. because the team was known for its efficiency,

C. whether

D. although they had managed to overcome similar issues in the past,
overcome similar issues in the past,

Select your answer:

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Modals Verbs Modals Auxiliary Comparison Academic Vocabulary Grammar - help/have/let/make Relative Clause Past Simple and Continuous Speech Tenses Spelling Present Tenses: Simple vs Continuous

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. What is the negative form of: ‘He plays the guitar.’?

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