________the problem, he wouldn't have committed those mistakes.
| A．If he understood | B．Had he understood | C．When he had understood | D．If he would understood |
During World WarⅡ, Japan attacked Pearl Harbor without declaring war _____ America.
| A．in | B．with | C．to | D．against |
Nowadays children have easy _______ access to computers, so most of them spend lots of time playing computer games after _______ class.
| A．an; the | B．/; the | C．an; / | D．/; / |
------Will you have a picnic with your classmates in the park this weekend?.
-------Yes, we may. But ______ .
| A．I’m afraid not | B．it’s up to you |
| C．it depends | D．take your time |
Her shoes _____ her dress; they look very well together.
| A．suit | B．fit | C．compare | D．match |
Mr. Wang came home so thin and weak that his own children hardly______ him.
| A．knew | B．realized | C．recognized | D．noticed |