Paper is useful invention．Cai Lun invented it around 2，000 years ago．（ ）
| A． |
a |
B． |
an |
C． |
the |
D． |
不填 |
He speaks French well，but of course he doesn't speak_______ a person from France．（ ）
A．as clear asB．clearer than
C．as clearly asD．the more clearly
We _______ the lessons for half a year．We are sure we can make it．（ ）
A．reviewB．reviewed
C．have reviewedD．are reviewing
With the development of science and technology ，5G _____ to help us live more conveniently．（ ）
A．usesB．is usedC．can useD．used
Andrew bought a small box ______the little sick cat． He wanted it to get better as soon as possible．（ ）
A．keepingB．keptC．keepD．to keep
Becky won't let Joe down if he ______ her a hand in tomorrow's competition．（ ）
A．givesB．giveC．gaveD．will give