We won't believe it ________ we see it with our own eyes.（ ）
| A． |
because |
B． |
unless |
C． |
if |
D． |
after |
Paul，do you know Jenny Fox？
Do I know Jenny？I her since she was born．（ ）
| A． |
know |
B． |
knew |
C． |
had known |
D． |
have known |
May I go out for a short break．Mr．Smith？
．Let's continue the meeting when you come back．（ ）
| A． |
Go ahead |
B． |
It depends |
C． |
Never mind |
D． |
Forget it |
This beautiful poem by Li Bai is still popular today．It has the test of time．（ ）
| A． |
failed |
B． |
stood |
C． |
taken |
D． |
made |
For the first time，I found ____ great fun to achieve something through hard work．（ ）
| A． |
it |
B． |
that |
C． |
this |
D． |
one |
If you are planning a trip to a place of interest，you'd better look in your local library a book about it．（ ）
| A． |
on |
B． |
at |
C． |
to |
D． |
for |