-Excuse me, Sir, is the swimming pool open all day?-____.Only from 6:00 pm to 10:00pm.
12.We have to study for a bright future, so we have to lose some sleep_________we're worn out.
11.Nowadays electrical energy_________from the sun has become the most widely used energy.
10.The country has changed so greatly over the past three decades that it has grown_________my wildest imagination.
9.Creative people are in a better position to succeed in both university and society than_________who may just be good test-takers.
8.-This is a gas station! And you_________know smoking is forbidden here.-Oh, terribly sorry.