Mom, shall we have supper now?—Oh, we won’t have supper ______ your dad comes back.

I kept looking at the man wearing a pair of glasses, wondering ________.

“Take a look at these pictures, and see if you can _____ the criminal． ” The policeman said to the witness．

It’s said that there are plenty of hotels in that town. There ____________ be any difficulty for you to find somewhere to stay.

It was very dark outside， ___________ we had to feel our way slowly.