How can you expect to learn anything ____ you never listen?
[     ]
A. in case
B. even if
C. unless
D. when
Why not try your luck downtown, Bob? That's _____ the best jobs are.
[     ]
A. where
B. what
C. when
D. why
Parents are taught to understand ______ important education is to their children's future.
[     ]

A. that
B. how
C. such
D. so

We cannot figure out _____ quite a number of insects, birds, and animals are dying out.
[     ]
A. that
B. as
C. why
D. when
You should try to get a good night's sleep _____ much work you have to do.
[     ]
A. however
B. no matter
C. although
D. whatever
The road is covered with snow. I can't understand ______ they insist on going by motor-bike.
[     ]
A. why
B. whether
C. when
D. how
— He is eager to try something he has never tried before.
— Oh, I see. That's ____ he's different from others.
[     ]
A. when
B. where
C. how
D. what
Children should be instructed to put things ____ they belong in their early childhood.
[     ]
A. where
B. in which
C. to which
D. what
He is strict with himself and always thinks of  ____ he can work well.
[     ]
A. when
B. that
C. what
D. how
— Hi, Peter. You seem to have gained a lot of weight. 
— Well, good food, not enough exercise. That's _____ I got fat.

[     ]

A. how
B. when
C. what
D. whether
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