The railway station was overflowing with people _______ back home for the Spring Festival.
| A．to head | B．heading | C．headed | D．head |
Did you find _____ impossible for him to tell the truth?
| A．this | B．it | C．that | D．what |
It isn’t quite _____ that the director will be present at the meeting tomorrow.
| A．sure | B．right | C．certain | D．exact |
The officers narrowly escaped _____ in the hot battle.
| A．have killed | B．to kill | C．to be killed | D．being killed |
The boy is only five years old, but he is quite used _____ the telephone.
| A．to answer | B．to answering | C．of answering | D．by answering |
--- What happened to your shoes?
--- They want _____。 .
| A．to mend | B．being mended | C．mending | D．mended |