下列各组词语中，有两个错别字的一组是（ ）

When I try to understand ____ that prevents so many Americans from being as happy as one might expect, it seems to me that there are two causes.

, you have been busy with your project, haven’tyou—Yes Now that it’s over, I’m going to _______ myselfto the Champions League Final match on TV this Saturday

Not a single book is allowed _________ out of the reading room according to the new rule

For the present, I can’t afford ________ a car.