花一整晚时间打电脑游戏真是浪费时间。
Spending the whole night playing computer games ______________________________
这部纪录片近距离的观察了非洲象的生活。
The documentary _______________________________ the African elephants.
— What is he busy doing?
— Doing the experiment _____(complete) the science project.
— Turn off the radio, dear. Baby is sleeping.
— There is no need. He __ _____(wake) up.
---Has the teacher finished marking the exam papers?
--- Sorry, I don’t know. He ______________(mark) them in the office in the afternoon.