26 This has made _______ possible for us to catch up with the developed countries. A that B it C us D our country
17..In the United States, bus travel doesn't cost much as train travel, ?18.
19..Someone is at the door, who is_________?20.
21.—It is raining cats and dogs.22. — ..23.
19.—My home is in that tall building over there. — ?
20. _________raining hard for 3 hours without stopping.21.