－We could have asked Mr. Zhang for help. He is always ready to help others.
－I ________ that. A long time _______.
| A．have forgot, wastes | B．forgot, wasted |
| C．forgot, was wasted | D．forgot, has been wasted |
Jack coughed day and night, so the doctor______him to take the medicine three times a day.
| A．hoped | B．suggested | C．advised | D．promise |
He’s got himself into a dangerous situation______he is likely to lose control over the plane.
| A．where | B．which | C．while | D．why |
____ printed, this science fiction will be popular among the students.
| A．Before | B．Unless | C．When | D．Once |
The manager commanded that the work ____ finished by the end of this month.
| A．should be | B．will be | C．must be | D．ought to be |
Selecting a mobile phone for personal use is no easy task because technology ____ so rapidly.
| A．will change | B．has changed |
| C．will have changed | D．is changing |