he is 70 years old， he still keeps exercising．（ ）
| A． |
If |
B． |
But |
C． |
/ |
D． |
Although |
﹣﹣______ fine weather it is! Let's go for a walk．
﹣﹣Sounds like a great idea．（ ）
A．WhatB．HowC．What aD．How a
In summer， food will go bad quickly ________ we put it into a fridge．（ ）
A．ifB．unlessC．as soon asD．while
The Nile is one of the _________ rivers in the world．（ ）
A．longB．longer
C．longestD．most longest
Tom's iPad is much newer than___________． And it is also more expensive．（ ）
A．IB．meC．myD．mine
Don't tell a lie． You are __________ honest boy．（ ）
A．aB．anC．theD．/