Coronaviruses (lat. Coronaviridae) is a family of viruses that includes, as of January 2020, 40 species of RNA-containing viruses United in two subfamilies[2] that affect humans and animals. The name is associated with the structure of the virus, whose spiny appendages resemble the solar corona[3]. The purpose of the "crown" in coronaviruses is related to their specific mechanism of penetration through the cell membrane by imitating "fake molecules" of molecules that the transmembrane receptors of cells respond to. After the receptor captures the fake molecule from the "crown", it is pushed by the virus into the cell and the RNA of the virus enters the cell[4][5].
Розкрийте дужки, вживаючи дієслова у Present Perfect, та доберіть відповіді на питання за зразком.
You (wash) the plates? ~
Yes, I …
Have you washed the plates? ~
Yes, I have.
You (see) him lately? ~
No, I …
Have you seen him lately? ~
No, I haven’t.
Where you (be)? ~ I (be) to the dentist.
You (have) breakfast? ~ Yes, I …
The post (come)? ~ Yes, it …
You (see) my watch anywhere? ~ No, I’m afraid I …
Someone (wind) the clock? ~ Yes, Tom …
I (not finish) my letter yet.
He just (go) out.
Someone (take) my bicycle.
The phone (stop) ringing.
You (hear) from her lately? ~ No, I …
I just (wash) the floor.
The cat (steal) the fish.
You (explain) the exercise? ~ Yes, I …
There aren’t any buses because the drivers (go) on strike.
You (have) enough to eat? ~ Yes, I (have) plenty, thank you.
Charles (pass) his exam? ~ Yes, he …
How many bottles the milkman (leave)? ~ He (leave) six.
I (live) here for ten years.
How long you (know) Mr. Pitt? ~ I (know) him for ten years.
Would you like some coffee? I just (make) some.
Mary (water) the tomatoes? ~ Yes, I think she …
You (not make) a mistake? ~ No, I’m sure I …
Why you (not mend) the fuse? ~ I (not have) time.
You (dive) from the ten-meter board yet? ~ No, I …
You ever (leave) a restaurant without paying the bill? ~ No, I …
I (ask) him to dinner several times.
He always (refuse).
I often (see) him but I never (speak) to him.
You ever (eat) caviar? ~ No, I …
We just (hear) the most extraordinary news.
The police (recapture) the prisoners who escaped yesterday.