问题补充:
It is only by practising English for several hours every day be able to use it freely.
A. will you
B. may you
C. that you will
D. when you must
答案:
A. will you
B. may you
(答案→)C. that you will
D. when you must
解析:考查强调句型。强调的是方式状语,不被强调的部分应用that引导。
【标签】强调结构