Select the most appropriate option to substitute the underlined segment in the given sentence. If no substitution is required, select No improvement. Pedestrians is to be careful when crossing busy roads. (a) need be caring when crossing (b) must be careful when crossing (c) would care if they are crossing (d) No improvement

Options

A. need be caring when crossing
B. must be careful when crossing
C. would care if they are crossing
D. No improvement

Answer

B

Explanation

Use ‘must be careful’ as must is used for compulsion/fixed determination and duty. ‘M ust’ is used to express obligation, give orders and give advice. In the given sentence an advice is given so “must” should be used here. Hence, option b is correct./