Occasions are quite rare ____ I have the time to spend a day with my kids.
| A．who | B．which | C．why | D．when |
Can you ___me to call Mr. Smith this afternoon? You know how forgetful I am.
| A．permit | B．persuade | C．remind | D．allow |
It was quite ___accident that I met him; he was homeless and ___rags at that time.
| A．by; in | B．on; in | C．at; by | D．in; in |
You should pay a lot of attention to children’s ideas; sometimes they ___be really creative.
| A．must | B．can | C．need | D．should |
He is very humorous, while his brother is rather serious. That is ___their difference lies.
| A．why | B．where | C．how | D．when |
I can still recognize Mr. Johnson, who is standing by the door, even though he looks ___different now.
| A．mostly | B．slightly | C．unlikely | D．finally |