In Britain the ________ are all painted red.
A. letter boxes
B. letters boxes
C. letter’s boxes
D. letters’ boxes
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Nowadays ________ are not always made of ________.
A. glass…glass
B. glasses…glass
C. glass…glasses
D. glasses…glasses
I want to buy three ________ of colured ________.
A. box…chalk
B. boxes…chalk
C. boxes…chalks
D. box…chalks
There are two ________ and three ________ in the picture.
A. sheeps…deers
B. sheep…deers
C. sheep…deer
D. sheeps…deer
以下药物治疗心阴虚失眠的是
A. 北沙参
B. 南沙参
C. 麦冬
D. 石斛
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