—It has rained for a day. What timely rain!
_____________.
| A．So it is | B．So is it | C．So it has | D．So has it |
A new product must be _________ before it comes into use.
| A．given out | B．tried out |
| C．put out | D．made out |
If you find yourself ______ no one will help you, please call me.
| A．which | B．when |
| C．where | D．what |
A big earthquake hit Ludian in Yunnan, ________ many deaths and injuries and a big loss of property.
| A．to cause | B．caused |
| C．causing | D．having caused |
In my opinion, ________ matters is whether we can win together as a team instead of individuals.
| A．how | B．it | C．that | D．what |
No student ________ go out of the school campus after 10：00 at night without permission according to the school regulations.
| A．shall | B．must |
| C．should | D．would |