Some tourists’ visiting Tian’anmen Square during the holiday left a ________ of litter everywhere they went.

They were afraid that their oil and food would soon ______ if the help didn’t come in time.[ ]

You trust an online shop just because it has a beautifully-designed website.

Hand in hand with reading, Dave ____ the habit of making notes.

The workers ___ busily when the boss came to look for something she ___ in the office