This is an illness that may result in total blindness if .
| A．being left untreated | B．left untreated |
| C．not left treating | D．not having left untreated |
All of the students were ______ by the ______ speech _______ by the leader.
| A．inspired; inspired; given | B．inspired; inspiring; gives |
| C．inspiring; inspired; given | D．inspired; inspiring; given |
. I have no idea _______ he left the party without _______ .
| A．why; noticing | B．how; being noticed |
| C．whether; notices | D．that; notice |
This job needs ______ patience and practice, after all, it will become ______ enjoyable experience after weeks.
| A．/ ; the | B．the ; the | C．/ ; an | D．the ；a |
They ______ the train to Beijing．Otherwise, they would have returned home．
| A．need have caught | B．must have caught |
| C．must catch | D．may catch |
His father was the first on the farm ______ against the slave owner．
| A．fought | B．fighting | C．to fight | D．having fought |