Hộ ạaaaaaaaaaaaaaaa thạnk

$Đáp$ $án$ $+$ $Giải$ $thích$ $các$ $bước$ $giải$ $:$

$Câu$ $45$ $:$ There are 45 students in our class `=>` Our class `has` `45` `student`

$\longrightarrow$ `D`

$\longrightarrow$ `Our` `class` `là` `số` `ít`