SECTION 3Error CorrectionThis section consists of 15 sentences; in each sentence there is
SECTION 3 Error Correction
This section consists of 15 sentences; in each sentence there is a part given in the brackets that indicates a grammatical error. Below each sentence, there are 4 choices respectively marked by letters A,B,C and D. Choose the word or phrase that can replace the part so that the error is corrected. There is only ONE right answer.
The average age at which people begin to need eyeglasses vary considerably.
A.varies
B.is varied
C.will vary
D.has been varied