Because of the (improve) ____in the road conditions, there are have been[br][/br]accidents recently.
举一反三
- Because of the (improve) _________ in the road conditions, there have been fewer accidents recently.
- Because of the (improve) ________ in the road conditions, there have been fewer accidents recently.
- Because of the (improve) ____in the road conditions, accidents recently.
- Because of the (improve) ________ in the road conditions, accidents has decreased recently.
- There ................ (has been, have been) more Americans killed in road accidents than in all the wars since 1900.