One Two Three Four Five six Seven Eight Nine Ten Eleven Twelve
1. essential c. absolutely necessary<span>
2. area of life e. sphere of activity
<span>3. memorize f. learn by heart </span>
4. adequate g. satisfactory, sufficient
<span>5. concept b. idea, opinion </span>
<span>6. variable a. thing that can vary </span>
<span>7. indispensable d. most important </span></span>
Is - was
are - were
have - had
do - did
see - saw
drink - drank
eat - ate
read - read
write - wrote
go - went
meet - met
take - took
run - ran
<span>give - gave</span>
Was coming, met
didn't want, was raining
was listening, rang
picked
watched