The question was brought to life again ________a person has the right to end his or her own life and a doctor has the right to assist.

________, I have to put it away and focus my attention on study this week. [ ]

Mr. Wang has two sons. of them are primary school students.

How long ______ he ______ a fever?— Ever since last night

Life on Mars will be better than ________on Earth ______ many ways.