I am doing my homework now.
She is cooking dinner.
The children are playing/
1 <span>b)was designed;
2 </span><span>c)there are.
3</span><span>are obtained.
4</span><span>b)is arranged;
5</span><span>divided.
6 </span><span>b)study;
7</span><span>c)entered.
</span>8<span>b)was working;
9</span><span>b)is used;
10</span><span>c)were introduced.
11</span><span>c)is going.
12</span><span>b)is covered;
13</span><span>b)would study;
14</span><span>c)had known.</span>
How much. .. the jeans cost? B)do
Jeans это существительное во множ числе,предложение в настоящем времени со смысловым глаголом cost,соответственно требуется вспомогательный глагол do.
I love Novruz Holiday, 'cause it is conndcted with the Spring