____ they all have in common is that they combine fun _____ the opportunity to learn something[ ]

go for along ride in a friend’s car, it’s the custom here to offer to pay some of the____.

The teacher often makes him ______ outside theclassroom.

One or two days ____quite enough to complete the work. ___ you or he going to work with me?

Fortunately somebody who happened to be passing by called the emergency aid the traffic accident occurred