He _____ more than 5,000 English words when he entered the university at the age of 15.
.Sunset at Mount Huangshan is a beautiful scene,_________I`ll never forget.
Mike is handsome,kind and full of energy。_________,I can`t speak too highly of him.
Teachers` advice of _________stress over the school days must be granted by the headmaster.
The public transportation in this city is very convenient,where many buses run _________ 。
—Where have you been all day? —I _________ some former classmates and I couldn`t get back until it was dark.