Let's learn to use the problem we are facinga stepping-stone to future success.
--Do you like the material?--Yes, it ___________ very soft.
--Where is Xiao Wang? --I don't know. He__________ be in the library.
Mr. Zhang gave all textbooks to all the pupils, except___________ who had already taken tem.
Mr. Alcott, headmaster of the school, refused to accept made by the Students' Union.
There was less food for birds and also for the Prairie dog, an ____holes in the ground.