السؤال 8

Select all that apply: which statements correctly use at, on or in for seasons and longer periods?

Many swallows migrate on winter.
The valley is quiet in winter.الإجابة الصحيحة
The device was invented at the nineteenth century.
Rail travel expanded in the nineteenth century.الإجابة الصحيحة

الشرح

The valley being quiet in winter and rail travel expanding in the nineteenth century both use in with an extended period. On winter and at the nineteenth century wrongly present those periods as a day or a precise point.

الشرح

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