It is reported that large amounts of locusts(蝗虫) _____ in their activity in the north now.

There is no need to __________ the fact that it was you that donated the 100 yuan.

It’s nothing unusual to experience failure, andought we to be so discouraged

I ask for a day off tomorrow —______ You know, the May Day holiday is just around the corner and every salesgirl is as busy as a bee

–What do you think the noise was? –It ___________ a cat.