. Dr. Frank failed many times but he finally _______ to find a successful way to solve the problem.
| A．broke off | B．broke out | C．broke down | D．broke through |
----- _______ school were you at last year?
----- Centre School.
| A．What | B．Which | C．That | D．Where |
Don’t have horse ______ too fast, it will get tired soon.
| A．ran | B．to run | C．runs | D．running |
We had to read ______ the light of a candle because the light went out.
| A．by | B．in | C．with | D．on |
Young Lee learned some English when she stayed in America, and last year she ____ herself Japanese.
| A．kept on teaching | B．went on teaching |
| C．kept on to teach | D．went on to teach |
_______ my opinion, you shouldn’t go there by yourself.
| A．On | B．To | C．In | D．At |