Tom said he had been working for three hours, _____ ,evidently, was untrue.
| A．he | B．this | C．it | D．which |
She was staring out over the lake，_____ in thought.
| A．lost | B．losing | C．to lose | D．to having lost |
It can be cheaper to buy a new washing machine than to get your old one _____.
| A．repaired | B．to repair | C．repairing | D．having repaired |
He started to explain， but she cut him short，_____ she had to catch a bus.
| A．saying | B．said | C．to say | D．having said |
_____ back problems， always bend your knees when you lift heavy objects.
| A．Avoiding | B．To avoid |
| C．Having avoided | D．To be avoiding |
A man rushed past and jogged her elbow，_____ the bag.
| A．making her drop | B．to make her dropped |
| C．making her dropping | D．to make her dropping |