There are a few towers in Zhuzhou， and the TV tower near the Yandi square is the ．（ ）
A．tallB．tallerC．tallest
Don't you know passengers ________ smoke on high﹣speed trains？（ ）
| A． |
needn't |
B． |
mustn't |
C． |
wouldn't |
D． |
couldn't |
Our national hero Yue Fei _______ to devote （贡献） himself to the country at a young age.（ ）
| A． |
failed |
B． |
forgot |
C． |
promised |
D． |
refused |
Your dad has just fallen asleep.Don't wake him up ______ it's really necessary.（ ）
| A． |
unless |
B． |
or |
C． |
and |
D． |
but |
Cathy always makes good use of her time to study，even _______ her lunch break.（ ）
| A． |
around |
B． |
during |
C． |
from |
D． |
between |
Our teacher often warns us it's ______ to leave much personal information on the Internet.（ ）
| A． |
interesting |
B． |
exciting |
| C． |
difficult |
D． |
dangerous |