Надо дописать эти предложения: 1.makes the same journey twice a year 2. desember-march: goes to california to have its babies 3. travels to alaska to gind food 4. april-august: goes back to california to lose its old coat and grow a new one текст elephant seals, sometimes called sea elephants, make the same journey not once seals go to the warm waters of california to . then they travel to cold waters find . seals go back to lose their old and . elephant seals trevel a long way-and get a lovely new coat too!

Elephant seals, sometimes called sea elephants, make the same journey not once but twice a year!
From Alaska, the seals go to the warm waters of California to have their babies.
Then they travel to cold waters of Alaska to find food.
From Alaska, the seals go back to California to lose their old coat and grow a new one.

1.Past Continuous (swim)
was/were swimming 
2.Future Perfect (learn)
Shall/will have learnt
3. Present Simple (cut) 
cut(I,you, we, they) /cuts (he, she,it)
4.Future Continuous (watch) 
shall/will be watching
5.Present Perfect Continuous (walk) 
have/has been walking
6.Past Simple (stand) 
stood
7.Future -in-the- Past Continuous (find)
shall/will  have been found
8.Present Perfect (wait) 
have/has waited
9.Past Perfect Passive (see) 
had seen
10.Future Simple (decide)
shall/will decide
11.Past Perfect (begin)
had begun
12.Present Continuous (have)
to be+ have / having (в зависимости от предложения, в роли чего выступает глагол have)
13.Future Perfect Continuous (work)
shall/will have worked
14. Future -in-the- Past simple (get) 
shall/will  have been got
15. Past Perfect Continuous (organize) 
had organized
16. Future -in-the- Past Perfect (bring)
shall/will  have been brought
17/ Future -in-the- Past Continuous (fish)
shall/will have been fishing
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will be coming  - Future Cont. Active
have been reading  - Pres.Perf.Cont.Active
understood  - Past Ind. Active
should be considered - Future-in-the-Past Ind. Passive
were applauding - Past Cont.Active
will have been working - Future Perf.Cont. Active
has been called - Present Perf.Passive
should have bought - Future-in-the-Past Perf. Active
had been playing - Past Perf.Contin. Active
are answering - Pres.Contin. Active
will have helped - Future Perf. Active
were being built - Past Cont. Passive
shall have been shown - Future Perf. Passive
had won - Past Perf. Active
should be leaving - Future-in-the-Past Cont. Active
will be invited - Future Ind. Passive
had been reached - Past Perf. Passive
would have been closed - Future-in-the-Past Perf. Passive
is being asked - Pres.Cont. Passive
will appreciate - Future Ind. Active
would have been talking - Future-in-the-Past Perf.Cont. Active
were sent - Past Ind. Passive