UNIT 4 CHOOSE THE CORRECT WORD ( A , B , C OR D ) TO COMPLETE THE SENT...

5. The sea was rough, so the ferry couldn’t sail. (2)

A. The ferry could sail because the sea was rough.

B. The ferry couldn’t sail because the sea was not rough.

C. The ferry couldn’t sail because the sea was rough.

D. The ferry could sail although the sea was rough.