Select the correct verb tense that is used in the sentence below.
1. that company has been making surfboards since the 1960s.
a. present perfect progressive
b. present progressive
c. past perfect progressive
d. past progressive
2.we had been listening to the radio when the lights went out.
a. past progressive
b. present progressive
c. past perfect progressive
d. past progressive
3.kalman had been sleeping throughout that memorable day.
a. past progressive
b. past perfect progressive
c. present progressive
d. present perfect progressive
4. sammi will have been writing her novel for two years this week.
a. past progressive
b. present progressive.
c. present perfect progressive
d. future perfect progressive

1.a. present perfect progressive, 2.c.past perfect progressive, 3. b.past perfect progressive, and 4. d.future perfect progressive

Explanation:

Present perfect progressive tense is formed with the modal Have (or Has for the third person; he/she/it) followed by Been followed by the of the verb in its -ing form. As it is the case in sentence 1 .

Past perfect progressive this formed with the modal Had followed by Been followed by the of the verb in its -ing form. As it is the case in sentences 2 and 3 .

Future perfect progressive tense is formed with the modal Will followed by the modal Have followed by Been followed by the of the verb in its -ing form. As it is the case in sentence 4.

- "there are several movements that doris lessing was associated with. first of all, communism. she pursued her communist beliefs and included them in her writing, and was also a member of several communist book clubs. she is also strongly associated with feminism, her fight for equality and women's rights.

doris lessing is the kind of writer who has followers, not just readers. they have been engaged to her chiefly because of her involvement in major problems, such as politics and woman-ism."