Which of the following sentences conveys a fact?  

He commanded that the students ______the classroom before he returned.

 ---Did you visit the temple? ---No. We _____it, but we spent too much time shopping.

 Now 70 years old, the British physicist, Pendry can’t remember a time when he was not asking a question as a kid, joking that he ________ his parents to death.

It is required by law that the children above six years old in our country ________ to school to receive education.

 —Will you join us in the party this Saturday evening? —If I ____ ,I would ;but I will have left for Japan on business by then.

. If my father ______ here yesterday, he would have stopped me from going surfing.

You only had meat and fish yesterday. If you had eaten vegetables, they         easily.

 --How do you find the health club? -- I ______. Everyone is saying its management is going from bad to worse. 

 --- I saw your uncle take a taxi to the airport. Why didn’t you drive him there? --- I ______. But my car ______.

—Sorry, sir. I can’t answer this question. ---Well, you are supposed______ this part of history.

They demanded that the books________ to the school library at once. 

The demand that the law on gun ownership _____ be changed ___ is very strong.

 He commanded that all the gates _____when it was getting dark in case thieves came in .   

 The headmaster demanded all the teachers ______ in the office.

—Why didn’t you turn up last night, Huck? —I ____ to go for a walk, but someone called and I couldn’t get away. 

---  My sister is very upset today. --- It is your fault. You ________________ the bad news to her yesterday.

 It was Mr. Zhang that helped us out of the trouble. Without his help, we ______ it so easily.

— What does the notice on the wall say? — “No person _____ take books out of the reading room; otherwise he _____ be fined.”

 I ___to my cousin’s birthday party last night, but I was not available