~Viết lại câu có nghĩa tương tự: Taking the necessary precautions, you shouldn’t have any health problems. ~ Điền giới từ: I didn’t think his work

~Viết lại câu có nghĩa tương tự:
Taking the necessary precautions, you shouldn’t have any health problems.
~ Điền giới từ:
I didn’t think his work was ……………. to standard so I asked him to do it again.