When the cooking class changed to Thursday, I had to so that I could pick up my son from his piano lesson.
| A．drop in |
| B．drop off |
| C．drop out |
| D．drop by |
In China, smokers have to face the reality that ______ people are dying of lung cancer.
| A．a great number of | B．a great deal of | C．a good many of | D．the number of |
Not all the students follow the rules. Which of the following statement has the same meaning？
| A．None of the students follow the rules. |
| B．All the students don’t follow the rules. |
| C．No students follow the rules |
| D．All of the above |
The farm grows various kinds of crops, _______ wheat, corn, cotton and rice.
| A．for example | B．as | C．so that | D．such as |
The boss insisted that every minute ______ made full use of ______ the work well.
| A．be; to do | B．was; doing | C．be ; doing | D．was ; to do |
Rather than _______ here waiting, I prefer _______to find out what on earth has happened.
| A．sit ; going | B．sit ; go | C．sitting ; go | D．sit ; to go |