Supply the correct forms of the verbs. 1. Ear protection (to require) in machinery space. 2. Many operations on board ship (to be) dangerous. 3. A lot of equipment (to be) very complex. 4. Maintenance equipment should (to keep) in good condition. 5. You will injure your hands if you (not wear) gloves.
1. Is required
2. Are
3. Is
4. Be kept
5. Don't wear