____________ the situation, Charles Yerkes undertook ____________ the system in 1902 by obtaining ownership of many different lines.
| A．Seeing, improving | B．Seen , improved |
| C．To see, to improve | D．Having seen, improving |
The theory he stuckto be right.
| A．to proving | B．to proved | C．proves | D．proving |
. The drunk driver isfor the traffic jam yesterday.
| A．to blame; occurred | B．to blame; occurring |
| C．to be blamed; occurred | D．to be blamed; occurring |
The professor spoke so fast that I foundhim.
| A．it hard following | B．it being hard to follow |
| C．hard to follow | D．it hard to follow |
A plan has been put forwardmore graduates should go to work in the countryside this year.
| A．when | B．that | C．whether | D．how |
The little girl had a luckywhen the earthquake happened.
| A．chance | B．surprise | C．hope | D．escape |