________ we go swimming in Xishuanghu Lake today? —- Oh, no. It’s ________ cold to swim on such days. I will catch a cold.

I’d like to help homeless people, so I could ________ food at the food bank.

I don’t know if it ______ tomorrow. If it ______, we’ll go out for a picnic.

Mr. Zhang ________ to school on the school bus every day．

We must______ using plastic bags in order to protect our earth..