Great changes ______ in my hometown in the past twenty years.
No one really knows exactly dfwhen the first people arrived in______we now know as California
I'll bring some medicine jus______some of us get sick while travelling.
—Have you found the missing?couple in the mountain ? —No, but we______hard to get in touch with them.
The average temperature in.Tibet has risen______ 0.32 degrees centigrade every decade since 1961, according to the China Meteorological Administration,.
—On which day shall we go outing in the Qiagling Mountains, Friday, Satutiby or Sunday? —______is all right.