问题

known to all language learners, newly learnt words will soon be forgotten unless ______.

A:exactly
B:finally
C:frequently
D:gradually;

正确答案是：

同类题型

I decided _______ fish for lunch today.

—Why do you look so worried?— My MacBook Pro broke down and my paper ______ unfinished since.[ ]

_____ cold weather, the workers are still working at the working site.

or _______ open, no matter how hard she pushed.

She forgot to tell me which bus to _____.