I have been looking for Michael for a whole day. Where ______ he have gone?

—Did you visit the museum today?—No. We _____ it, but we spent too much time shopping.

I’ve ordered some pizza, so we _______ worry about cooking when we get home tired.

 —Did you meet with the famous space hero , Yang Liwei ?—______ I had come here earlier !

It is usually not quite cold in this area in March, but sometimes temperature __________be very low.