Question

A border checkpoint is a place, generally between two countries, where travellers or goods ____________ inspected.

Q: Answer-A border checkpoint is a place, generally between two countries, where travellers or goods _________...

Some countable nouns in English such as earnings, goods, odds, surroundings, proceeds, contents, and valuables only have a plural form and take a plural verb. Here, the sentence is in the present tense. Also, is is incorrect. The verb are is correct. A border checkpoint is a place, generally between two countries, where travellers or goods are inspected.