The old scientist devoted most of his time __________ the space science.
| A．develop | B．to developing |
| C．to develop | D．developing |
—Is that Helen’s aunt?
---.That is Mary’s aunt.
| A．Yes,she is | B．No,it isn’t | C．Yes,it is | D．No,he isn’t |
--her books?
--They are in her bag.
| A．What are | B．Where is | C．What is | D．Where are |
—Do you like playing computer games?
--No ,I think it’s .
| A．relaxing | B．boring | C．fun | D．interesting |
—Your watch is very nice.
--- .
| A．Thank you . | B．OK | C．No,it’s not | D．Yes,it is. |
Here a set of keys and here my books.
| A．are ,is | B．is ,is | C．is ,are | D．are ,are |