_________ difficult and challenging the task may be, we must finish it on time, because there is a possibility _________we’ll be fired if we can’t fulfill the task on time.
It was when she was sleeping in her bedroom __________ a thief broke into the house.
________ take the aeroplane all the way, they decided to fly to Vancouver and then take the train from west to east across Canada.
It’s heavy, but I can ________ to carry it upstairs.
---- It is a long time since I saw my sister. ----________ her this weekend?Why not to visit B. Why not visit C. Why not visiting D. Why don’t visit
What _______ the foreign experts most is that the new factory is perfectly environment-friendly.