They often stay up, reviewing their lessons, books all over the desk.
| A．spreading | B．spread |
| C．are spreading | D．to spread |
Parents are advised to take pressure_____a child and give him or her some encouragement before an exam.
| A．off | B．over | C．from | D．to |
Some people would rather ride bikes as bike riding has _______ of the troubles of taking buses.
| A．nothing | B．none | C．some | D．neither |
In America, if _______ friend has invited you to drop i
n at any time, it is _______ best to call
before visiting to make sure it is convenient for him.
| A．a; a | B．the; a | C．a; 不填 | D．the; 不填 |
People in industrial countries take in _________as they actually need every day.
| A．twice as much protein | B．protein as much twice |
| C．twice protein as much | D．protein as twice as much |
To meet the challenge, the young people preferred _______ heavier work to do in their spare time.
A．to have  given |
B．to be giving | C．having give | D．to be given |