The first textbooks __________ for teaching English as a foreign language came out in the 16th century.
______is going to go climbing please gather at the school gate at 8 on Sunday morning..
_________ around our school campus, the visiting teachers from other schools were led to our meeting room.
The joke was so interesting that we all burst out laughing. Never before __________ heard a joke like that.
—What job do you want to have ,Steve?—I’d like to find a fun and challenging job, one _________ I can always try out my new ideas.
The fact has worried teachers and parents ________ more and more students have got near-sighted.