单项选择题
A．gun B．watch C．telescope D．compass
______ of the young men in our village find odd jobs in...
单项选择题______ of the young men in our village find odd jobs in the city.
He has never seen the Greens and be knows ______ about ...
单项选择题He has never seen the Greens and be knows ______ about them.
It is necessary that anyone ______ exercises every day ...
单项选择题It is necessary that anyone ______ exercises every day if he wishes to keep healthy.
