The light is still on. They ___ to turn it off when they left the room.
| A．must forget | B．could have forgotten |
| C．may forget | D．must have forgotten |
Is this factory _____ you visited the other day？
| A．the one | B．that | C．where | D．when |
Who would you rather _____ the report instead of you？
| A．have written | B．have to write | C．write | D．have write |
Madame Curie, for _____ life had once been very hard, was successful later.
| A．whom | B．which | C．whose | D．that |
“Good morning. Can I help you?” “I’d like to have this package _______.”
| A．be weighed | B．to be weighed | C．to weigh | D．weighed |
Tony was very unhappy for _______ to the party.
| A．having not been invited | B．not having invited |
| C．having not invited | D．not having been invited |