It is a safety requirement to ____________ an access bridge over a motorway.
举一反三
- The rules also________ (requirement) employers to provide safety training. A:
- There is ________bridge over the river.
- There is________800-meter-long bridge over the river.
- A bridge was built ______ the river. A: [A] on B: at C: over
- There is ( ) 800-metre-long bridge over the river. A: a B: an C: the D: /