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7. Choose the correct tense form.
My uncle will work in the field if it ...

A) will rain B) will not rain C) rains D) don't rain E) doesn't rain

8. Change the sentence to passive voice
Dad used a knife to open the window

A) Dad was used a knife to open the window B) a knife was been used to open the window C) a knife was used to open the window
D) The window was used by dad to open
E) Dad is used a knife to open the window

9. Choose the correct variant.
They ... to get to the top of the mountain yet

A) could B) hadn't C) have been able to D) was able E) haven't been able