11.52 Choose the correct word. 1 There is a huge variety/variation between
petal shape and colour in plants
2 I'm very interested in pursuing a career in
genetics/genetic
3 we haven't tested it on a(n) living/alive organism
yet.
4 We can use DNA in order to carry out an
accurate paternal/paternity test.
5 The invention of the optic/optical lens was a
great moment in the history of biology.​

1. two new engineers just were introduced to the head of the department.2. i am sure i will be asked at the lesson tomorrow.3. they told me that the new student was spoken much about.4. he said that the grandmother's letter was received the day before.5. this new dictionary was sold everywhere now.6. all the texts were looked through yesterday and a single mistake was found.

i am  lying.i am doing homework.it is raining right now.i am going to gym  at the moment.

вот список глаголов(но существуют и исключения), которые не используются в continuous tenses:

wantlikebelongknowsupposeneedloveseerealizemeanforgetpreferhatehearbelieveunderstandrememberseemhave (если в значении ‘владеть’)think (в значении ‘полагать’)

некоторые из этих глаголов могут употребляться в сontinuous tenses, если они означают:

to think – “обдумывать”to see – “встречаться”to have – в таких выражениях, какto have breakfast, to have dinner, to have a good time,to have supper, to have troubles, и т.д.

ответ: 1-a) we  should not  burn  garbage.  it.            2- c) plants  growing  in the sea            3-c) greenpeace  protect  the oceans,  rivers, seas  and lakes            4-c)  we can  help the animals  if  we do not  cut wood            5-a)  we can help  the fish  if we do not  pollute the  oceans, rivers  and lakes