شرکت در آزمون آنلاین زبان انگلیسی 1 - زبان انگلیسی 1 | آزمون شماره 8810

They have two houses; one in England and one in US. They do not pay taxes by living ............... .

Doctors often ask people to go to the laboratory and have a blood test. They order blood tests to …… things such as the levels of glcose, hemoglobin, or white blood …… . Sometimes, blood tests can help doctors see whether an organ (such as the liver or kidneys) is working well. Blood tests can also help doctors find medical problems or  …… .

The student tried hard to … the math problem, but she couldn’t find the answer at the end.

?Which sentence is grammatically wrong