—Bob! How’s your project? I heard you started it last Friday, right?—Oh! I ______ for it. But I haven’t decided when to do it.
Plants grow well ______ there is plenty of water and sunshine.
—Did you write to Grace last summer? —No, but I'll ______ her over Christmas vacation.
In summer people usually stay up late outside, ______ the cool air.
The foreiger knows little about ______ is called "Hope Project" in China.
He was born ____ a very cold night _____ December.