- 试题详情及答案解析
- My father likes smoking. He often says that giving up smoking is the easiest thing in the word. I know because I________ it thousands of times.
| A．have done | B．am doing |
| C．will do | D．do |
- 答案：A
- 试题分析：由文中thousands of times判断用现在完成时。句意：我父亲喜欢吸烟。他经常说戒烟是世界上最容易的事。我知道意为我已经做过好几千次。
考点：考查现在完成时的用法。