Eal of detailed research is being performed in this area

?Choose the correct answer. The business letter _has__ just _arrived__.

?Choose the correct answer. Usually business letters _are typed/written__ on special forms.

?Choose the correct answer. Don’t touch the door, it _has__ just been painted___ .

?Choose the correct answer. She’s going to be late because her plane __is delayed___.

?Choose the correct answer. Many modern apartments _have been built__ in Berlin since 1980.

?Choose the correct answer. These televisions _are made________ in Korea.

?Choose the correct answer. America _was discovered________ by Europeans.

?Choose the correct answer. The last piece of cake __was eaten______ by him.

?Choose the correct answer. The letter _has been____ already ___sent_____.

?Choose the correct answer. The Silk Road _was used_ by many caravans.