________ are you looking for， madam？ I think everyone is here．
I don't think so． Where's David？（ ）
A．WhoB．WhatC．WhenD．Where
In difficult times， there are always national heroes_____step up and bring people hope．（ ）
| A． |
whom |
B． |
which |
C． |
who |
Even if we learn something well， we will forget it_____we use it．（ ）
| A． |
while |
B． |
until |
C． |
unless |
With the improvement in transportation， students in some small villages no longer go on ropeways_______rivers to schools．（ ）
| A． |
to cross |
B． |
crossing |
C． |
crossed |
"Tara， what's your favorite_____？""Orange． Half of my dresses are orange．"（ ）
| A． |
fruit |
B． |
drink |
C． |
color |
______January 25， President Xi told the public that nothing matters more than people's safety and health．（ ）
| A． |
From |
B． |
On |
C． |
In |