The professor has received the letter ____ to give a lecture in ftinceton Institute.
Since David ________ downloaded a virus into his computer, he can not open the file now.
¾It’s getting dark, but Mr.Johnson is still at his office. ¾No surprise.Who else can ______ he does?
People eatvegetables per person today as they did ten years ago.
The police tried to get some clues from the suspect,but he remained .
--- Do you like the place of interest? -- On the contrary, it’s the place that I want to visit.