--- I have worked harder than before, but I still didn't get good grades in math. --- Don't worry. .
I have been to Shanghai. I ____________ there last month.
A snake bit him ___________ he went to see a doctor at once.
Who listens _________, Tom, Jack or Bill?
We have never visited the museum, but we have ______ it.
—Would you please show me the way _________ the bank? —Yes, go straight ahead. It’s opposite a school.