24. When we climbed up to the top of the mountain, we were all _______.
| A．tired and out of the breath | B．tiring and short of the breath |
| C．tired and out of breath | D．tiring and short of breath |
_______ the people have become masters of their country _______ science can really serve the people.
| A．It is only then; that |
| B．It was that; when |
| C．It is only when; that |
| D．It was when; then |
—I would never come to this restaurant again.The food is terrible!
—_______.
| A．Nor am I | B．Neither would I |
| C．Same with me | D．So do I |
The old couple have married for 40 years and never once _______ with each other.
| A．they had quarreled |
| B．they have quarreled |
| C．have they quarreled |
| D．had they quarreled |
I just wonder _______ that makes him so excited.
| A．why it does | B．what he does |
| C．how it is | D．what it is |
It was with great joy _______ he received the news _______ his lost son would soon return home.
| A．because; that | B．that; that |
| C．because; which | D．that; / |