20. His parents were teachers in that school, _______ lost their lives in order to save
their students in the earthquake.
| A．none of them | B．both of them | C．none of whom | D．both of whom |
____ it happens, her birthday is after mine.
| A．As | B．While | C．Though | D．Until |
It is such a modern machine ______ few of the workers know how to operate.
| A．as | B．which | C．that | D．the one |
_____ and I will hit you.
| A．If you say that again | B．Say that again |
| C．Say you that again | D．You’ll say that again |
China is larger than _____ in Africa.
| A．any other country | B．other countries |
| C．any countries | D．any country |
They are _____ children that they can’t dress themselves.
| A．so little | B．such little | C．so small | D．too small |