—— What happened to the young trees we planted? —— The trees______well, but I didn’t water them.
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.