—This problem is too difficult. Can you show me _______, George?
—Sure.
| A．what to work out | B．to work it out |
| C．how to work it out | D．to work out it |
Is this a picture of ____ family, Jim?
| A．your | B．my | C．our | D．its |
Do you see Mr. Brown go ____?
| A．to upstairs | B．in upstairs | C．down /upstairs | D．upstairs |
–Is there ____ milk in the glass?
---Yes, there is ____.
| A．some; little | B．any; any | C．any; some | D．a; any |
---Do you often _____ your sister?
---Yes, she often writes to me.
| A．hear | B．hear of | C．hear from | D．hear about |
---Whose pens are there?
--They are ____. They aren’t ____.
| A．his; mine | B．mine; him | C．them; theirs | D．her; our |