There is still a strong argument ________ mobile phones are a particular risk to children.
A．when B．which
C．that D．what
Students ________ remain in their seats until all the papers have been collected.
A．shall B．might
C．could D．will
John Wood，an Internet blogger，discovered that Samsung ________ for not protecting its workers from a dangerous chemical used on its phones.
A．had criticized B．had been criticized
C．was criticized D．was criticizing
The sign says that children are admitted only if ________ by an adult.
A．to be accompanied B．accompanying
C．accompanied D．to accompany
Li Hua has been elected ________ monitor of our class to take ________ place of Ma Li.
A．the；不填 B．the；the
C．不填；the D．不填；不填
—Would you like to help me with my work?
—_______
A．With pleasure. B．No，I wouldn't.
C．Yes，I would. D．My pleasure.
