命题“∃x∈R+，lnx＞0”的否定是（ ）
A：∃x∈R+，lnx＞0
B：∀x∈R+，lnx≤0
C：∀x∈R+，lnx＞0
D：∃x∈R+，lnx≥0
— Your painting really improves a lot.
— I have taken a painting ________ since last year. I find my painting is getting better.
