For the following questions, choose the past form or past participate of underlined verb. if the verb is correct, choose no error as the answer.
1. justine (sell) her old camera and brought a new one.
a. selled
b. sold
c. have selled
d. no error
2.brandon sold most of his sculptures at the art show last weekend, but he (keep) his favorite one.
a. keeped
b. kept
c. have kept
d. no error
3. the united states has (lead) the field in the development of computers.
a. led
b. leads
c. leaded
d. no error
4. after dinner, everyone (sit) down in the shade of the big oak tree.
a. sits
b. sat
c. seated
d. no error