Mark the letter A, B, c, or D on your answer sheet to indicate the correct answer to each of the following questionsThey will be able to walk across the river _______ . A. when the ice will
Mark the letter A, B, c, or D on your answer sheet to indicate the correct answer to each of the following questions
They will be able to walk across the river _______ .
A. when the ice will be thick enough
B. if the ice will be thick enough
C. if the ice is thick enough
D. unless the ice is thick enough