I don’t think _________ is possible to master a foreign language without much memory work.
| A．this | B．that | C．it | D．its |
_____ in the strange city, poor Bill fell to _____.
| A．Lost; crying | B．Lost; cry |
| C．To lose; cry | D．Having been lost; crying |
_____, water can be changed into gas.
| A．Heated | B．Being heated |
| C．Having heated | D．Having been heated |
There is _____ what the weather will be like.
| A．not knowing | B．no knowing | C．not know | D．no known |
I am too glad _____ you.
| A．to see | B．seeing | C．saw | D．at seeing |
The Arctic is considered _____ the northern part of the Atlantic.
| A．having been | B．to have been | C．to be | D．being |