پرسش‌ها با تگ (گرامر انگلیسی)

The shrinking range poses ……… to Africa’s elephants.

 Although Margaret Mead had several assistants during her long investigations of  Samoa, the bulk of the research was done by ……… alone.  

 Not until a student has mastered algebra ……… the principles of geometry,  trigonometry, and physics. 

 ……… their differences, the three models resemble ……… in a crucial respect.   

Medical research at the cellular level, ……… research on the immune system, has been  made possible through twentieth-century advances in techniques of genetic research.  

 With the exception of mercury, ……… at standard temperature and pressure. 

 Mars, the fourth planet from the Sun, ...... of sky gazers. 

فرق دو جمله ی انگلیسی زیر  از لحاظ گرامری و معنی  چیه ؟ i cut my hair last week i got my hair cut last week

 ……… is rooted in experiments in iron and steel conducted in the nineteenth  century.