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單句改錯下列句子中均有一處錯誤，請找出并改正。

1. I have been to Fun Times last week.

2. I study Chinese history for four years.

3. —Have you ever been to the Blue Mountain?

—No,ever.

4. I have gone there three times.

5. How often have you been here?

5. Mr. Walson to America 20 years ago and has been here .

   A. has gone;since then

   B. went;since ever

   C. has gone; ever since

   D. came;ever since

4. I want to know who the first computer in the world.

   A. found   B. discovered

   C. invented   D. improved

3. The language school has really me English.

   A. helped;learned   B. help;learned   C. help;learn   D. helped;learn

2. Mr. Green China for several years.

   A. has been to   B. has gone to

   C. has been in   D. came to

1. —How long have you studied English?

--.

   A. For 5 years   B. 5 years ago

   C. Since 5 years   D. 5 years before

5. The children started to watch the film at 2 o’clock and it (not finish) yet.

4. I will try my best (improve) my spoken English.

2. I (study) English at this school for three years.

3. Li Ming (go) to America three months ago.

1. your grandmother (be) to the Palace Museum before?