A healthy diet should be ________ in fibre and ________ in sugar and fat.

[　　]

If you eat ________ fat and sugar without enough exercise, you'll put on weight easily.

[　　]

Every day we eat a lot of sugar ________ cakes, sweets, fruits and so on.

[　　]

Even though you are resting or even sleeping, your body ________ some calories.

[　　]

The sports meeting has been put off till next week, ________ we'll not be very busy.

[　　]

The purpose of new technologies is to make life easier, ________ it more difficult.

[　　]

—Shall we go skating or stay at home?

—Which ________ do yourself?

[　　]

—What do you think of the book?

—Oh, excellent. It's worth ________ a second time.

[　　]

—If you keep on, you'll succeed ________.

[　　]

In the dark street, there wasn't single person ________ she could turn for help.

[　　]

A．that

B．who

C．from whom

D．to whom