--- How many hours do they exercise every day?
----________.
A. Twice a day B. Often C. Two
I spent all my free time ________ speaking English.
| A．practise | B．practicing |
| C．to practice | D．practises |
My bike is lost. I can’t find _______. So I want to buy a new _________.
| A．it; it | B．it; one |
| C．one; it | D．it; that |
___________ stars were shining in sky at night.
| A．Million | B．Millions |
| C．Million of | D．Millions of |
I will call you _________ I come back from Beijing.
| A．until | B．as soon as |
| C．unless | D．while |
I ________ believe it __________ I see it with my own eyes.
| A．won’t; and | B．will; but |
| C．will; until | D．won’t; until |