I.........buy souvenirs for my family while I'm in London next week.
a) need to b) must c) have to
The model answer given by my Egyptian teacher is (a). I think 'must' is better here, isn't it?
"Must" is more imperative. It describes an absolutely necessary action. " I am frequently steered away from using "must" in correspondence, for example, because it's non-negotiable imperative implication can be regarded as impolite.
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"Must" is more imperative. It describes an absolutely necessary action. "I must find my passport before I leave for the airport!"
"Need to" is less so: "I need to pick up some souvenirs before I leave for the airport."
I am frequently steered away from using "must" in correspondence, for example, because it's non-negotiable imperative implication can be regarded as impolite. "Dear