1.A

2.B

3.D

4.A

5.C

6.A

7.B

8.B

9.C

10.D

1)he is going to the post office he wants to send a letter

A because         B but         C and            D moreover

2)she bought potatoes cabbage at the market

A although         B and         c however       D but

3)they learn english they intend to go abroad

A and           B or            c so           D because

4)his hobbies are playing soccer collecting stamps 

  A and         b but              c however         D although

5)i'd love to play volleyball i must complete my homework

A since         b moreover           C but           D and

6)i wear a hat i don't want to be sick

A because         b but        C therefore       d and 

7)i am going to the supermarket i want to buy some food

A therefore           B because          C but           D however

8)do you want to have coffee tea?

A and           B or      C although          D and

9)she studies well she is busy

A because      b since          C although          d and

10)they went to school it was raining hard

A however            B and             C therefore          D although