There was a big fire in the street last night, but the firemen _______ within twenty minutes.

.We didn’t find the Blacks during the lecture. — No one had told them about _____ a lecture.

Look! The two boys always come in and go out in pairs. —That’s really as a saying goes, “_______.”

Have you ever been to Shanghai, Mary?—Yes. I ___________ there three times.

Although the old man lives with his children ,he still feels____.