______ you understand this rule, you’ll have no further difficulty.
| A．while | B．Once | C．Though | D．Unless |
—Please give me a call when you get home and let me know you are safe.
—_____.
| A．I can | B．I will | C．I should | D．I am going to |
I am _____ to hear the _____ news that my brother has passed the driving test.
| A．delighted; delight | B．delighted; delightful |
| C．delightful; delighting | D．delightful; delighted |
—Our English teacher is so great!
—_____, especially his oral English.
| A．I couldn’t agree more | B．That’s all right |
| C．I’m not sure about it | D．I don’t agree with you |
I found _____ impossible to keep silent about what had happened to me.
| A．it | B．that | C．this | D．these |
It came as _____ great achievement for China’s space program when Liu Yang went to ______ space as the first Chinese female astronaut.
| A．the; a | B．a; the | C．a; \ | D．the; \ |