Questions 13 to 14 are based on the conversation y
单选题 According to the air traffic rules
单选题 Space vehicles were launched into outer space ______ search of another living planet.
单选题 The street was named ______ George Washington who led the American Revolutionary War.
单选题 If it had not rained yesterday
单选题 Tom told me that he was really rich and owned a Ferrari, but I ______ him at once.
单选题 I didn't see you at the meeting. If you had come
单选题 You cannot see the doctor ______ you have made an appointment with him.
单选题 Not until all the fish died in the river ______ how serious the pollution was.
单选题 When they entered the room
单选题 It ______ that the jewels had been stolen by a traveler.
单选题 He ______ to see you yesterday
单选题 It is extremely urgent that they ______ from the destroyed building before dark.
单选题 John is the only one of the students in the class that never ______ a mistake even when it is pointed to him.
单选题 If you had taken my advice last week
单选题 It's high time ______ him a severe lesson for being late.
单选题 Although I told him to be careful over and over again, he never took any ______ of what I said.
单选题 Please see to it ______ no one comes in without identification.
单选题 It was ______ he arrived home ______ he realized that he had left his keys in the office.
单选题 As a child, Tom studied in a village school
