We consider 'it of great importance（）children should form the habit of being ready to help others.

单项选择题She started to learn English when she was very young,（）contributes to her success in her career.

A．that
B．so that
C．so
D．which

单项选择题If（）in the fridge, the fruit can remain fresh for more than a week.

A．kept
B．keeping
C．be kept
D．to keep