We have brought in a good grain harvest for three years_________.
| A．on purpose | B．on end | C．on duty | D．on watch |
He told us to take as ___ as we need.
| A．a new | B．many | C．little | D．much |
The memorial ___ very soon lies in the north of the city.
| A．opened | B．having been opened | C．being opened | D．to be opened |
The student did what they ___ the old man.
| A．could help | B．could helping | C．could to help | D．might help |
The young man suddenly returned __ a rainy night.
| A．at | B．in | C．during | D．on |
He had rushed out of the door __ I could offer my thanks.
| A．unless | B．before | C．until | D．even though |