Not until they left school ___ how much their teachers loved them and helped them．
| A．they realized | B．did they realize |
| C．they had realized | D．had they realized |
The first thing you must remember is that in order to succeed, it is almost compulsory that you ______ optimistic.
| A．be | B．need to be |
| C．will be | D．shall be |
--- _______ the plane have taken off on time?
--- I’m afraid not. So many flights were delayed due to the bitterly cold weather.
| A．Will | B．Should |
| C．Can | D．Must |
Nowadays, many parents are trying to either prevent their children from failure, or protect them from the knowledge ______ they have failed.
| A．when | B．where | C．what | D．that |
Last year alone, the temporary unemployment insurance lifted 2.5 million people out of poverty, and ________ the blow for many more.
| A．corrected | B．cushioned |
| C．compensated | D．corresponded |
___________the many ways illegal immigrants come into the United States every year, the vehicle crammed with crowds seems to be the method of choice lately. However, tragedies such as deaths on the journey to the destination, are sometimes reported nowadays．
| A．In | B．For | C．Of | D．On |