—Can I pay the bill by check?--- Sorry, sir. But it is the management rules of our hotel that payment ____ be made in cash.

Sometimes smiles ______ be false, hiding other feelings like anger, fear or worry.

If you spend the spring sneezing, take a look at your plate. Some foods _____ make allergies worse.

He __________ be at home now because I saw him in the office just now.

–What do you think we can do for our parents? --You ____ do anything except to show your love -- a kind word, a warm smile and a helping hand.