The government should protect the oldvaluable buildings ____ they are not in harmony with the modern ones nearby

I’d like to walk with you _________ the river bank——________ you’re happy.

She is so helpful that she is always ready to help people in trouble. Which of the following is correct for the underlined word in the sentence

Let’s plan a surprise party for our class. What’s your idea—Why not ______ a short play

Please don’t make so much noise. I hear the speaker very well.