-----Itrytomemorizenewwordseveryday,butonlyrememberfewo...

問題詳情：

----- I try to memorize new words every day, but only remember few of them.

----- That’s not surprising. Newly-learnt words are easily forgotten unless frequently _____ in communication.

A. used          B. using         C. to use         D. be used

【回答】

知識點：動詞

題型：選擇題