______the classmates ______ the teachers taught the boy French, so hehad to teach himself.

The most important thing_____we should pay attention to is the first thing _____I have said.

The plane is due to take off at 7：50 from the airport—________ we fail to arrive there on time—Try to take another flight then

254. You can recognize a tree by the ______of its _______.

It’s raining heavily. Let’s stand under that bigtree.–______________. It’s very dangerous to do so in suchweather.