Now more and more teachers feel _____ tired because of _____ work. [ ]

A. too much, much too

B. much too, too much

C. much too, too many

D. too much, too many

如果甲参加“五、一”户外活动，那么乙、丙和丁也将一起参加“五、一”户外活动。如果以上断定是真的，则以下哪项也一定是真的

A．如果甲不参加“五、一”户外活动，那么乙也不参加。

B．如果乙、丙和丁一起参加“五、一”户外活动，那么甲也参加。

C．如果甲和乙参加“五、一”户外活动，则丙和丁不会参加。

D．如果丁不参加“五、一”户外活动，那么甲也不参加。