Mark the letter A, B, C or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions.
The burglar might come back. You'd better change all the locks.
A.If you don't change all the locks, the burglar could come back.
B.You'd better change all the locks or the burglar will come back.
C.The burglar will come back unless you change all the locks.
D.You'd better change all the locks in case the burglar comes back.
The burglar might come back. You'd better change all the locks.
A.If you don't change all the locks, the burglar could come back.
B.You'd better change all the locks or the burglar will come back.
C.The burglar will come back unless you change all the locks.
D.You'd better change all the locks in case the burglar comes back.
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