Not until they left school how much their teachers loved them and helped them.
| A．they realized | B．did they realized |
| C．they would realized | D．had they realized |
______ after a long walk, Mike called and said he couldn’t come to the party.
| A．Having worn out | B．Being worn out | C．To wear out | D．Worn out |
October 1, 2009 is a special day, ________ I think, that will be remembered by all the Chinese forever.
| A．which | B．what | C．it | D．one |
The child, who was believed _______ by a tiger, was found in a forest.
| A．to be killed | B．having killed | C．to have been killed | D．to be killing |
_______ the two are only several days apart in age, they seem to belong to wholly different generations.
| A．While | B．When | C．As | D．Since |
Soldiers are trained under conditions that closely ______ real army inspection of PRC on National Day in Beijing.
| A．similar | B．resemble | C．like | D．compare |