I would like to be scientist in the future． They are so great．（ ）
| A． |
a |
B． |
an |
C． |
the |
D． |
不填 |
Five﹣star hotels can ________ first﹣rate service，making passengers feel at home.（ ）
A．provideB．preventC．protectD．prepare
Our monitor is ________.He never shows off before others.（ ）
A．organizedB．modestC．generousD．energetic
—I hear your brother will enter Tsinghua University this summer.
—Exactly，he was a born genius.He was able to read and write ________ the age of 4.（ ）
A．inB．onC．atD．of
My family have ________ breakfast together every day.This helps us start a day well.（ ）
A．不填B．aC．anD．the
﹣﹣﹣I feel really bad about all the mess.
﹣﹣﹣______.I can always clear it up later.（ ）
A．Don't worryB．That sounds great
C．Thanks a lotD．That would be nice