单项选择题
A．in B．shining C．rising D．falling
21（）A．comesB．beginsC．appearsD．shines
单项选择题21（）
A．comes B．begins C．appears D．shines
It is difficult ______ a world record and even more dif...
单项选择题It is difficult ______ a world record and even more difficult to ______ it.
The computer of the airports have helped people greatly...
单项选择题The computer of the airports have helped people greatly. ______, more people travel by plane in Chin
