---Answer the doorbell, please. It must be your uncle.
---It Heidi. She’s coming over this morning to help me with my math.
| A．is | B．can’t be | C．could be | D．will be |
______, he always makes time for his family.
A. No matter he is busy B. No matter how busy he is
C. However he is busy C. However busy is he
--- Now the situation has been kept under ______ control.
--- Yes. ______ role John played in it was very important.
| A．the; A | B．/; The | C．the; The | D．/; A |
______ reaching the top of the mountain, a feeling of happiness and a sense of achievement will be experienced.
| A．With | B．In | C．About | D．Upon |
The computer was used in teaching. As a result, not only _______, but students became more interested in the lessons.
| A．saved was teachers’ energy | B．was teachers’ energy saved |
| C．teachers’ energy was saved | D．was saved teachers’ energy |
They are sure that they can make ______ possible for their model cars to run without electricity.
| A．so | B．much | C．that |
D．it |