It was my sister ________ first had the idea to cycle along the entire Mekong River.
One survey shows that large quantities of water ______wasted every year in China.
Although she is pretending hard to be young, grey hair and the lines on her face _______.
It was in the hotel where my father works _______ I met the film star.
— Can you meet me at the airport at 9 o’clock next Monday?— I’d like to, but I ________ an English class then.
The bird was lucky enough to escape _______ by the young man .