There are no customers in the hotel. It ______ have the friendliest service.

Don’t interrupt me ,John ．      you force me to tell you the truth at the moment?

(2013·潍坊市高三二模)Sometimes smiles ________ be false, hiding other feelings like anger, fear or worry.

--Whose T-shirt is this? --It       be John’s. It’s much too small for him.

Often he______ sit for hours doing nothing at all when he was in low spirits.