I will not speak unless _______.
| A．I will be asked to | B．asked | C．asked to | D．I am asked |
Lucy is ________ university student.She likes playing ________ piano.
| A．a; / | B．a; the | C．an; the | D．an; / |
This year the number of the US students ____in China has increased by 18.4percent compared to last year.
| A． to study | B． studying | C． having studied | D． studied |
You had better encourage your children to____some of their pocket money for future education .
| A． put aside | B． put up | C． put off | D． put back |
The price of oil is increasing so rapidly.
Indeed ! The oil prices____by 10 and 20 percent so far.
| A． increased | B． increase | C． had increased | D． have increased |
Interestingly, the pet dog has been____to carry newspapers for its master.
| A． trained | B． checked | C． changed | D． turned |