You ought to have given them some advice.–________, but who cared what I said?

_______ trees have been planted near here, so the air is very fresh.

The taxis in this city ________ in the same color. You can see them every day.

It’s hard for them to walk _____ the forest. [ ]

Do you know whether scientists have ________a good way to deal with Influenza H7N9 or not?—Not yet .But they’re trying their best.