More and more people choose to shop in a supermarket as it offers a great ______ of goods.
My brother isn’t very good at English, but _____ maths, he is second to none.
Many a student _____ playing games on the playground and only one girl or two _____ reading in the classroom.
– Have you ever been back to our Alma Mater(母校) after graduation? -- Of course. _____. Which of the following is incorrect?
At the bell, the door opened and _____, dashing towards the dinning hall, all shouting and laughing.
It was on a train _____ I was travlling to Xi’an _____ I made the acquaintance of the old professor from UK.