基本信息
从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。
1.─Shall I take a message for you?─____________.
A. You are welcome B. With pleasure
C. Thanks for your message D. It’s nice of you
2. As is known to us all , it takes years of ________ practice to gain ______ skills of ______ expert in this field.
A. 不填；the；an B. the；the；不填
C. the；the；an D. a；不填；the
3. Students are frequently advised to ______unnecessary words when writing an essay.
A. cross off B. break off C. let off D. leave off
4. The _________ of the time the pupils spend at school has been limited to no more than six hours a day for primary students.
A. number B. sum C. quantity D. amount
5. The ability to store knowledge makes computers different from every other machine ______ invented.
A. thus B. as C. ever D. yet
