—Hi, Bob, are you going to attend tomorrow's conference?
—Oh, I'm afraid not, ____ invited too.
[     ]
A. even if
B. as if
C. as
D. since
Don't you know _____, my friend, it is you that she loves?
[     ]
A. who            
B. which       
C. that            
D. what
  ___ travel can broaden your mind , I don’t think it’s a good idea to spend too much time and money
on it .  
[     ]
A. If    
B. While    
C. Because  
D. As  
She's looking at me _______ she ________ me, but I've never seen her before in my life.  
[     ]
A. as if, knows
B. as if, knew
C. as though, knows
D. even if, knew
He stood still in front of the shop window ______ he were thinking something.
[     ]

A. as though
B. even though
C. as long as
D. although

It is obvious that people hold different opinions about _____ voluntary services should be financially rewarded.
[     ]
A. that
B. what
C. if
D. whether
He found it increasingly difficult, _____ his eyesight was beginning to fail.
[     ]
A. though
B. for
C. but
D. so
Hardly _____ to the airport _____ he was surrounded by many journalists and fans.
[     ]
A. the famous singer had got; when
B. the famous singer got; then
C. had the famous singer got; when
D. did the famous singer get; then
One can't learn a foreign language well _______ he studies hard.

[      ]

A. though
B. but
C. if
D. unless
— Is Tom still smoking?
— No, it's a long time ______ he smoked. By next Saturday he ______ for three months without
smoking a single cigarette.

[     ]

A. that, will be going
B. after, will have gone
C. since, will have gone
D. before, has gone
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