We can easily become unhappy_____ we work out our problems in our daily life.

A. after                 B. if               C. until            D. unless

 Write down the phone number, __________ you’ll forget it.

    A. so           B. and              C. but              D. or

—Would you like to go for a walk with me, Allen?

—I'd love to, ________you don't want to go alone.

A. until   B. before    C. if    D. after

 They will try their best in the Dragon Boat Racing ______ they may fail.

A. if         B. although        C. unless        D. until

—How do you like the story?

—Interesting, _______ the end of it is not perfect.

A. so　　　　　 B. though　　　　　 C. or　　　　　 D. because

 The magazine was started by Becky, ______ I know.

A. as far as       B. as well as     C. as soon as     D. as much as

__________ Amy likes to go to the cinema, but she doesn’t like to see horror films.

  A. Since        B. As        C. Though          D. 不填

We didn’t start our discussion _____ everybody arrived.

A. since　　 B. if　　 C. while　 D. until

Take the exam carefully, _____ you won’t get full marks.

A. but　　 B. and　　 C. or　　 D. so

_____ he was only twelve, he could run faster than any kids in the school.

             A. Though                   B. Because                   C. If