– Do you know the West Lake in Hangzhou?
– Yes, this is the third time that I ____ this beautiful city.

—Ken, why do you look so tired? 
—I _______ myself to the climate since I came here.

Travelling in space has been made __________ possible with the development of science and technology.

This is the first time we ______ a film in the cinema together as a family.

--Excuse me, I don't think you can smoke here.
---Really sorry. I ______ this is a non-smoking room.

.— Mr White didn't come last night, did he?
　— No. We _____for him . A whole night was wasted.
　  

It was the first time that I ___________ the night face to face.

Tony said that he _________ to China to see the giant pandas the next week.

Look at the timetable (时刻表). Hurry up! Flight 4026 _______ off at 18:20.

Our teacher told us that there ______ no end to learning.