All the students in our class buried themselves ________studies，________
the coming exam.
| A．in；preparing |
| B．in；preparing for |
| C．for；prepared |
| D．for；prepared for |
She keeps a supply of candles in the kitchen in case of power ______.
| A．drop | B．lack | C．failure | D．absence |
Mr. Smith used to smoke ______, but he has given it up.
| A．seriously | B．heavily | C．badly | D．hardly |
--- Have you finished your homework?
--- No, I ______ my father on the farm all day yesterday.
| A．was helping | B．am helping |
| C．have helped | D．helped |
I often see him steal things from our supermarket. Do you think I ______ report it to the manager?
| A．can | B．will | C．should | D．may |
. --- Excuse me, but I want to use your computer to type a report.
--- You _____have my computer if you don't take care of it.
| A．shan't | B．might not | C．needn't | D．shouldn't |