please check this exercise. . Fill in the blanks using the present perfect tense. One has been done for you.
(come) to your school to emonstrate a few things
about using computers for your studies. As we .
recently, th computeri a very important tool in the modern world. How many
of u .
(learn) to use the computer recentl .
b. We know that pollution
(become) a threat to our survival.
Before the Industrial Revolution in the 19th century, people lived more in harmony with
their immedipte environment. With the spread of industrialization, the problem of
pollution . "14:0...
. (increase). When the Earth's population was much
smaller, no one believed pollution would ever resent serious problem. With
the increasing population on the planet, it
. . (become) a p rent
that there are limits. Pollution is one of the signs that humans .
(exceed) those limits.
a few friends to join us for dinner. We
. see) them in awhile. I
the menu simple. I
(buy) the meat I will cook. I
with it. Will that be all right?
(be) tothe market and I
... (plan) to make some pulao to go