Not until he left his home ________ to know how important the family was for him.
| A．did he begin | B．had he begun |
| C．he began | D．he had begun |
Please read the ________ on the bottle and take the right amount of medicine.
| A．explanations | B．descriptions |
| C．instructions | D．introductions |
They did not sell a single car for a month and had to ________ some workers.
| A．lay out | B．lay up |
| C．lay off | D．lay down |
I don’t think I will need any money but I will bring some _______.
| A．at last | B．in case |
| C．once again | D．in time |
The disease failed to _______ to the new drugs the doctor used.
| A．respond | B．reflect |
| C．reply | D．reduce |
The experiment, though they had tried their best, ________ to be a failure.
| A．turned up | B．turned out |
| C．turned in | D．turned on |