Question

Roses are quite _____ flowers in English gardens.

A．ordinary

B．common

C．usual

D．general

Answer 1

B. common.

common(="usual" and ordinary; happening of found often and in many places)普通的；常見的；常常發(fā)生的；到處可見的：a common experience(普通的經歷)；a common tree(常見的樹木)。This bird is common throughout Europe.(這種鳥在歐洲很常見。)They can treat most of the common diseases.(他們能治療大多數常見病。)
usual(="done," found, used or existing most of the time) 經常的，通常的，慣例的，習以為常的；強調時間習慣方面，例如：This is the usual state of the house.(這房子里平常就是這種樣子。)
ordinary正常的，普通的，正常的；an ordinary day(平凡的一天)，ordinary people(普通人), a piece of ordinary dance music(一首普通的舞曲)。
general普通的。它與common比較，語氣稍強，含有很少例外的意外。
可見本題中用common是最佳的選擇。