سؤال ۹، زبان انگلیسی ۳، دی ۱۳۹۸

I think Mina ...... a new mobile phone, hasn’t she? (to buy)

Three people ...... in the car accident last week. (to kill)

Before my brother moved to China, he...... Chinese. (to learn)

The letter must ...... to the company immediately. (to send)