—Do you think the thief entered through the back door?
—No, if he had, I don’t believe he ______ the living-room window.

If people eat natural plant poisons by mistake, they _______ go to hospital without delay.

There _____ be any difficulty in passing the road test since you have practised a lot in the driving school.

Some aspects of a pilot's job      be boring, and pilots often      work at inconvenient hours．

One of our rules is that every student_____wear the school uniform while at school．

Last night Li Ping watched the football match at my home, so he________ in his office.

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

--- I was lucky to win a gold medal in the 800-meter-race.
--- You __________ through tough training.

You have a big mouth, Li Fei. You ________ have told everybody the secret.

－What does the sign over there say?
－“No person _______ bring drinks into the student computer pool.”