Flight 551 for Dalas ______ I must beoff now — Have a pleasant trip then

The police officers in our city work hard ________ the rest of us can live a safe life.[ ]

“Only two centimeters higher, _______ break the world record,” encouraged the coach

－When I first got to Harvard, my terrible English was a burden to me.－Oh, dear, it ________ a struggle for you to keep up with other students.

What do you think of my answer to the questions — Sorry. I ________ about something else.