—To make sure the food we eat every day is safe, the government is doing something useful .
— ___________
A. That’s not true.
B. That’s all right.
C. That’s great.
We built this factory ______ top speed and minimum(最少的) cost.
| A．in | B．at | C．with | D．on |
There is a big and beautiful lake ______ the foot of the hill.
| A．at | B．in | C．with | D．on |
We go _____ duty at 8 a.m.
| A．on | B．in | C．at | D．for |
Li and I arrived ______ Heishan country safe and sound, all is well. Don’t be worry.
| A．in | B．on | C．/ | D．at |
The kids are doing some experiment ______ the farm in the country.
| A．in | B．at | C．on | D．for |