In an English dictionary，which word comes before "toothache"？（ ）
A．whileB．riskC．trustD．uniform
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
Lucy，could you please help me_______ the map on the wall？ We need it now．（ ）
A．put downB．put onC．put offD．put up