Question

Yo ___________________ los programas de televisión todos los sabados. a. mirabas c. miraban b. miraba d. mirabais

Answer 1

For this case, the verb in English is given by:
 The conjugation of the verb in English is:
 I watched
 you watched
 he/she/it watched
 we watched
 you watched
 they watched
 Therefore, when we refer to "Yo" the conjugation in Spanish is given by:
 Yo miraba
 Therefore, the answer for this case is:
 Yo miraba los programas de televisión todos los sabados
 Answer:
 Yo miraba los programas de televisión todos los sabados
 b. miraba 

Answer 2

Miraba because it matches the -ar verb ending for the yo form.