Suspecting him of robbing the bank, the Security Police were ___ his phone calls. [ ]

Jacky is so careless. He my books and pens the floor when he walked past my desk just now.

okesman did not give out the detailsof the message, saying, “it should not be made public as it is a ______ issue”

―Excuse me, but I don’t think you can take photos here.―Sorry, I _______ this is a no-photo zone（地区）.

It was in Beihai Park _____ they made a date for the first time ______ the old couple told us their love story.