Professor Jordon is well known for his _____ into the habits of the common housefly.
| A．examination | B．introduction | C．research | D．expression |
I ______ the poor rabbit, but I didn’t have the right drugs with me at that moment.
| A．saved | B．had saved | C．could save | D．could have saved |
______ has recently been done to provide more buses for the people, a shortage of public vehicles remains a serious problem.
| A．What | B．Though what | C．In spite of what | D．However what |
On hearing the news, the president ______ his visit to Australia and returned home immediately.
| A．broke off | B．went off | C．kept off | D．took off |
The boss was accused of having a ______ against his female employees.
| A．reputation | B．prejudice | C．symptom | D．profession |
Finally we decided to fly to France for the winter holiday on our first stop, ________ we planned to stay for three days.
| A．when | B．there | C．which | D．where |