In England, most people........work until they are 67.
a) must b) have to
I go for 'have to' because this is an external obligation, but the answer given by the exam setter is 'must'. He says that we use 'must' to talk about laws. How can I differentiate between 'must' and 'have to' in a sentence like this.
In this sentence there is virtually no difference in meaning, but "must" feels more formal. People would naturally use "have to" in everyday situations. The sentence is factually inaccurate.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
In this sentence there is virtually no difference in meaning, but "must" feels more formal. People would naturally use "have to" in everyday situations.
The sentence is factually inaccurate.