We should keep our classroom _____.
A. cleans B. cleaning C. clean
_________ boys are there in our class?
| A．How often | B．How long | C．How many | D．How much |
There _____ a pen, two pencils on the desk.
| A．is | B．are | C．have | D．has |
—Lily, here are your pens. Please _____.
—OK, Mom.
| A．put away it | B．put it away | C．put away them | D．put them away |
I don’t like physics ______ it’s too difficult for me.
| A．and | B．so | C．because | D．But |
—_____ do you _____ the book?
—It’s very interesting.
| A．What; like | B．What; think of | C．How; think | D．How; think of |