— ______ I’m very busy now. Could I call you back after work?—OK. I'll wait for you.
On August 12,2009, Typhoon Morakot swept across Taiwan island, _____ a lot of villages _____.
It is so heavy a box _____ no one can move.
—Why does the lake smell terrible? —Because large quantities of water _____.
Sarah hopes to become a friend of_______ shares her interests.
After years of overwork, my father’s health ____ and he had to retire from business.