There is “u” and “s” in the word “us”.
The book is worth____. A. to read B.reading C.read
The river has become much ______ than before because of the waste water from the factories. A. dirty B. dirtier C. Dirtiest
.一Would you please pass me something to drink? 一What about some___? A. green tea B. bread C.Fish
It’s raining. Please take ______ orange raincoat on the desk with you when you go out. A. a B. an C. The
Mathone of thesubjects in middle schools.