單項選擇題When workers are organized in trade unions, employers find it hard to lay them()

A.off
B.side
C.out
D.down


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1.單項選擇題It’s more () to buy a season ticket if you travel every day.

A.cheap
B.economic
C.economical
D.saving

2.單項選擇題To study a foreign language,()

A.a good dictionary should be bought
B.buying a good dictionary is necessary
C.you should buy a good dictionary
D.it is necessary that you will buy a good dictionary