— What are these?
--- They are________.
| A．a shelf | B．shelfs | C．shelves | D．shelf |
—Why didn’t you ask me to help you with your work?
—You are so busy. I won’t ___________ much of your time.
A. take up B. take off C. take to
The number of the students in our school____about 1000 and a number of them____boys.
A. are ;is B.is;is C.is;are
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