[ Modal Verbs ]
When we arrived at the gate, we ______ show our passports.
A. must
B. had got to
C. had to

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Grammar › ViewMuch of that Styrofoam _(end/ends)_ up polluting the oceans and killing sea turtles.
A. end
B. ends
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The match went ahead ________ the rain.
A. in case of
B. in spite of
C. even though