Is this the reason at the meeting for his carelessness in his work?
| A．he explained | B．what he explained |
| C．how he explained | D．why he explained |
Mr Smith, _____ of the _____ speech, started to read a novel.
| A．tired; boring | B．tiring; bored |
| C．tired; bored | D．tiring; boring |
She thought I was praising her son, _____ as a matter of fact, I was scolding him for his bad behavior at school.
| A．while | B．therefore | C．which | D．so that |
_____ no doubt _____ the Amber Room is one of the wonders of the world.
| A．It is; that | B．It is; whether |
| C．There is; that | D．There is; whether |
Although this medicine can cure you ________your illness, it has a bad effect____ you.
| A．for; in | B．for; on | C．of; on | D．of; at |
Only after the woman had her own child ________ how difficult it was to be a mother.
| A．she realized | B．had she realized |
| C．she had realized | D．did she realize |