--The river used to be clean. How does it become dirty? -- There are many factories ________ waste water into it. A. pouring B. pour C. poured
“__ you’ve made! But you should work still harder,” the teacher said to the boy.
The head teacher with his students __that park if it __ tomorrow.
The number of ___ in our class _____about two hundred.
That book isn’t so _______ as this one.
The underlined part in the word “ least” is pronounced as _______.