Scientists first ______ the idea of the atomic bomb in the 1930s.

______ today, he would get there by Saturday.A．Was he l...

单项选择题______ today, he would get there by Saturday.

With the introduction of the electronic computer, there...

单项选择题With the introduction of the electronic computer, there is no complicated problem can be solved in a few hours.

The fire cause ______ damage to the church.A．conservati...

单项选择题The fire cause ______ damage to the church.