Question

There are hundred of miles of pipeline and just a few pipeline workers. It __________difficult for pipeline workers to find an oil spill as soon as it happens.

must be

does not

can't be

Answer 1

Respuesta:

There are hundred of miles of pipeline and just a few pipeline workers. It __________difficult for pipeline workers to find an oil spill as soon as it happens.

can't be

Explicación:

Answer 2

Respuesta:

There are hundred of miles of pipeline and just a few pipeline workers. It _must be_________difficult for pipeline workers to find an oil spill as soon as it happens.