如今一些父母对自己的孩子要求太严厉了.(be too hard on sb.)
We are supposed to (鼓励)the young to read more books.
Keeping an English diary can help us improve our writing (能力).
This is the (第八) year for Jim Green to stay in China.
The plane flew at a (高度) of three thousand meters.
It's necessary for us to (等待) in line in public.